feat: add dummy appsettings.json file

WebApp/appsettings.example.json

@@ -0,0 +1,12 @@
+{
+  "ConnectionStrings": {
+    "DefaultConnection": "Server=some_host;Database=database_resource;Username=database_user;Password=some_password"
+  },
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "AllowedHosts": "*"
+}