diff --git a/Data/ApplicationDbContext.cs b/Data/ApplicationDbContext.cs
new file mode 100644
index 0000000..d4850f0
--- /dev/null
+++ b/Data/ApplicationDbContext.cs
@@ -0,0 +1,29 @@
+// using Microsoft.AspNetCore.Identity;
+// using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Logging;
+using QuotifyBE.Entities;
+
+namespace QuotifyBE.Data
+{
+    public class ApplicationDbContext : DbContext //<User, IdentityRole<string>, string>
+    {
+        public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
+            : base(options)
+        {
+        }
+
+        public DbSet<User> Users => Set<User>();
+        public DbSet<Quote> Quotes => Set<Quote>();
+        public DbSet<Category> Categories => Set<Category>();
+        public DbSet<Image> Images => Set<Image>();
+
+        protected override void OnModelCreating(ModelBuilder builder)
+        {
+            base.OnModelCreating(builder);
+
+            builder.Entity<QuoteCategory>()
+                .HasKey(vs => new { vs.QuoteId, vs.CategoryId });
+        }
+    }
+}
\ No newline at end of file
diff --git a/Entities/Category.cs b/Entities/Category.cs
new file mode 100644
index 0000000..b168608
--- /dev/null
+++ b/Entities/Category.cs
@@ -0,0 +1,8 @@
+namespace QuotifyBE.Entities
+{
+    public class Category
+    {
+        public int Id { get; set; }
+        public string? Name { get; set; }
+    }
+}
diff --git a/Entities/Image.cs b/Entities/Image.cs
new file mode 100644
index 0000000..206b648
--- /dev/null
+++ b/Entities/Image.cs
@@ -0,0 +1,8 @@
+namespace QuotifyBE.Entities
+{
+    public class Image
+    {
+        public int Id { get; set; }
+        public string? Url { get; set; }
+    }
+}
diff --git a/Entities/Quote.cs b/Entities/Quote.cs
new file mode 100644
index 0000000..896c5f6
--- /dev/null
+++ b/Entities/Quote.cs
@@ -0,0 +1,19 @@
+using System.ComponentModel;
+
+namespace QuotifyBE.Entities
+{
+    public class Quote
+    {
+        public int Id { get; set; }
+        required public string Text { get; set; }
+        required public string Author { get; set; }
+        //public int CategoryId { get; set; }
+        public int ImageId { get; set; }
+        public DateTime CreatedAt { get; set; }
+        public DateTime LastUpdatedAt { get; set; }
+        public int UserId { get; set; }
+
+        public User? User { get; set; }
+        public ICollection<QuoteCategory>? QuoteCategories = new List<QuoteCategory>();
+    }
+}
diff --git a/Entities/QuoteCategory.cs b/Entities/QuoteCategory.cs
new file mode 100644
index 0000000..b5b30a7
--- /dev/null
+++ b/Entities/QuoteCategory.cs
@@ -0,0 +1,11 @@
+namespace QuotifyBE.Entities
+{
+    public class QuoteCategory
+    {
+        public int QuoteId { get; set; }
+        public int CategoryId { get; set; }
+
+        public Quote? Quote { get; set; }
+        public Category? Category { get; set; }
+    }
+}
diff --git a/Entities/User.cs b/Entities/User.cs
new file mode 100644
index 0000000..5ddf67f
--- /dev/null
+++ b/Entities/User.cs
@@ -0,0 +1,10 @@
+namespace QuotifyBE.Entities
+{
+    public class User
+    {
+        public int Id { get; set; }
+        required public string Name { get; set; }
+        required public string Email { get; set; }
+        required public string PasswordHash { get; set; }
+    }
+}
diff --git a/Migrations/20250714093636_initial_migration.Designer.cs b/Migrations/20250714093636_initial_migration.Designer.cs
new file mode 100644
index 0000000..c96b12b
--- /dev/null
+++ b/Migrations/20250714093636_initial_migration.Designer.cs
@@ -0,0 +1,167 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using QuotifyBE.Data;
+
+#nullable disable
+
+namespace QuotifyBE.Migrations
+{
+    [DbContext(typeof(ApplicationDbContext))]
+    [Migration("20250714093636_initial_migration")]
+    partial class initial_migration
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "9.0.7")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("QuotifyBE.Entities.Category", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Name")
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Categories");
+                });
+
+            modelBuilder.Entity("QuotifyBE.Entities.Image", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Url")
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Images");
+                });
+
+            modelBuilder.Entity("QuotifyBE.Entities.Quote", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Author")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<int>("ImageId")
+                        .HasColumnType("integer");
+
+                    b.Property<DateTime>("LastUpdatedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Text")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Quotes");
+                });
+
+            modelBuilder.Entity("QuotifyBE.Entities.QuoteCategory", b =>
+                {
+                    b.Property<int>("QuoteId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("CategoryId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("QuoteId", "CategoryId");
+
+                    b.HasIndex("CategoryId");
+
+                    b.ToTable("QuoteCategory");
+                });
+
+            modelBuilder.Entity("QuotifyBE.Entities.User", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Email")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PasswordHash")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Users");
+                });
+
+            modelBuilder.Entity("QuotifyBE.Entities.Quote", b =>
+                {
+                    b.HasOne("QuotifyBE.Entities.User", "User")
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("QuotifyBE.Entities.QuoteCategory", b =>
+                {
+                    b.HasOne("QuotifyBE.Entities.Category", "Category")
+                        .WithMany()
+                        .HasForeignKey("CategoryId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("QuotifyBE.Entities.Quote", "Quote")
+                        .WithMany()
+                        .HasForeignKey("QuoteId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Category");
+
+                    b.Navigation("Quote");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/Migrations/20250714093636_initial_migration.cs b/Migrations/20250714093636_initial_migration.cs
new file mode 100644
index 0000000..8806415
--- /dev/null
+++ b/Migrations/20250714093636_initial_migration.cs
@@ -0,0 +1,134 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace QuotifyBE.Migrations
+{
+    /// <inheritdoc />
+    public partial class initial_migration : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "Categories",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    Name = table.Column<string>(type: "text", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Categories", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Images",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    Url = table.Column<string>(type: "text", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Images", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Users",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    Name = table.Column<string>(type: "text", nullable: false),
+                    Email = table.Column<string>(type: "text", nullable: false),
+                    PasswordHash = table.Column<string>(type: "text", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Users", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Quotes",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    Text = table.Column<string>(type: "text", nullable: false),
+                    Author = table.Column<string>(type: "text", nullable: false),
+                    ImageId = table.Column<int>(type: "integer", nullable: false),
+                    CreatedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    LastUpdatedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    UserId = table.Column<int>(type: "integer", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Quotes", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Quotes_Users_UserId",
+                        column: x => x.UserId,
+                        principalTable: "Users",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "QuoteCategory",
+                columns: table => new
+                {
+                    QuoteId = table.Column<int>(type: "integer", nullable: false),
+                    CategoryId = table.Column<int>(type: "integer", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_QuoteCategory", x => new { x.QuoteId, x.CategoryId });
+                    table.ForeignKey(
+                        name: "FK_QuoteCategory_Categories_CategoryId",
+                        column: x => x.CategoryId,
+                        principalTable: "Categories",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_QuoteCategory_Quotes_QuoteId",
+                        column: x => x.QuoteId,
+                        principalTable: "Quotes",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_QuoteCategory_CategoryId",
+                table: "QuoteCategory",
+                column: "CategoryId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Quotes_UserId",
+                table: "Quotes",
+                column: "UserId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "Images");
+
+            migrationBuilder.DropTable(
+                name: "QuoteCategory");
+
+            migrationBuilder.DropTable(
+                name: "Categories");
+
+            migrationBuilder.DropTable(
+                name: "Quotes");
+
+            migrationBuilder.DropTable(
+                name: "Users");
+        }
+    }
+}
diff --git a/Migrations/ApplicationDbContextModelSnapshot.cs b/Migrations/ApplicationDbContextModelSnapshot.cs
new file mode 100644
index 0000000..2af654c
--- /dev/null
+++ b/Migrations/ApplicationDbContextModelSnapshot.cs
@@ -0,0 +1,164 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using QuotifyBE.Data;
+
+#nullable disable
+
+namespace QuotifyBE.Migrations
+{
+    [DbContext(typeof(ApplicationDbContext))]
+    partial class ApplicationDbContextModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "9.0.7")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("QuotifyBE.Entities.Category", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Name")
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Categories");
+                });
+
+            modelBuilder.Entity("QuotifyBE.Entities.Image", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Url")
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Images");
+                });
+
+            modelBuilder.Entity("QuotifyBE.Entities.Quote", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Author")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<int>("ImageId")
+                        .HasColumnType("integer");
+
+                    b.Property<DateTime>("LastUpdatedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Text")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Quotes");
+                });
+
+            modelBuilder.Entity("QuotifyBE.Entities.QuoteCategory", b =>
+                {
+                    b.Property<int>("QuoteId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("CategoryId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("QuoteId", "CategoryId");
+
+                    b.HasIndex("CategoryId");
+
+                    b.ToTable("QuoteCategory");
+                });
+
+            modelBuilder.Entity("QuotifyBE.Entities.User", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Email")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PasswordHash")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Users");
+                });
+
+            modelBuilder.Entity("QuotifyBE.Entities.Quote", b =>
+                {
+                    b.HasOne("QuotifyBE.Entities.User", "User")
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("QuotifyBE.Entities.QuoteCategory", b =>
+                {
+                    b.HasOne("QuotifyBE.Entities.Category", "Category")
+                        .WithMany()
+                        .HasForeignKey("CategoryId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("QuotifyBE.Entities.Quote", "Quote")
+                        .WithMany()
+                        .HasForeignKey("QuoteId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Category");
+
+                    b.Navigation("Quote");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/Program.cs b/Program.cs
index 48863a6..5ecae42 100644
--- a/Program.cs
+++ b/Program.cs
@@ -1,5 +1,14 @@
+using Microsoft.EntityFrameworkCore;
+using QuotifyBE.Data;
+using QuotifyBE.Entities;
+
 var builder = WebApplication.CreateBuilder(args);
 
+// Configure Database Conecction
+var connectionString = builder.Configuration.GetConnectionString("DefaultConnection") ?? throw new InvalidOperationException("Connection string 'DefaultConnection' not found.");
+builder.Services.AddDbContext<ApplicationDbContext>(options =>
+    options.UseNpgsql(connectionString));
+
 // Add services to the container.
 
 builder.Services.AddControllers();
@@ -12,6 +21,7 @@ var app = builder.Build();
 // Configure the HTTP request pipeline.
 if (app.Environment.IsDevelopment())
 {
+    app.UseMigrationsEndPoint();
     app.UseSwagger();
     app.UseSwaggerUI();
 }
diff --git a/QuotifyBE.csproj b/QuotifyBE.csproj
index 51579d7..9ea07e8 100644
--- a/QuotifyBE.csproj
+++ b/QuotifyBE.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk.Web">
+<Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
     <TargetFramework>net8.0</TargetFramework>
@@ -10,8 +10,19 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="EntityFramework" Version="6.5.1" />
+    <PackageReference Include="Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore" Version="8.0.18" />
     <PackageReference Include="Microsoft.EntityFrameworkCore" Version="9.0.7" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="9.0.7">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="9.0.7">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
     <PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.22.1" />
+    <PackageReference Include="Npgsql" Version="9.0.3" />
     <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="9.0.4" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="9.0.3" />
   </ItemGroup>
diff --git a/appsettings.example.json b/appsettings.example.json
index 10f68b8..4a5ad9e 100644
--- a/appsettings.example.json
+++ b/appsettings.example.json
@@ -1,4 +1,7 @@
 {
+  "ConnectionStrings": {
+    "DefaultConnection": "Server=server-host;Database=db-name;Username=quotify-user;Password=user-secret"
+  },
   "Logging": {
     "LogLevel": {
       "Default": "Information",