feat: refactor docker workflow; build both amd64 and arm64 docker images

.gitea/workflows/docker.yaml

@@ -1,4 +1,5 @@
-# Credit: https://www.vanmeeuwen.dev/blog/automating-docker-builds-with-gitea-actions
+# Credits: https://www.vanmeeuwen.dev/blog/automating-docker-builds-with-gitea-actions
+# https://gitea.com/gitea/runner-images/src/branch/main/.gitea/workflows/release.yaml
 
 name: Build and push Docker image
 run-name: Building image on ${{ gitea.actor }}'s commit
@@ -15,6 +16,12 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker BuildX
+        uses: docker/setup-buildx-action@v3
+
       - name: Login to registry
         uses: docker/login-action@v2
         with:
@@ -22,24 +29,26 @@ jobs:
           username: ${{ secrets.REGISTRY_USER }}
           password: ${{ secrets.REGISTRY_PASSWORD }}
 
-      - name: Build Docker image
+      - name: Set outputs
+        id: vars
         env:
           BRANCH_NAME: ${{ github.ref_name }}
-          SHORT_HASH: ${{ github.sha }}
         run: |
-          # Build the image with the commit hash tag
-          docker build --build-arg BUILD_IDENTIFIER=${SHORT_HASH:0:5} -t gitea.7o7.cx/kittyteam/kittybe:${BRANCH_NAME}-${SHORT_HASH:0:5} .
+          echo branch_name="$BRANCH_NAME" | tee -a $GITHUB_OUTPUT
+          echo short_hash=$(git rev-parse --short HEAD) | tee -a $GITHUB_OUTPUT
 
-          # Tag the same image as "latest"
-          docker tag gitea.7o7.cx/kittyteam/kittybe:${BRANCH_NAME}-${SHORT_HASH:0:5} gitea.7o7.cx/kittyteam/kittybe:${BRANCH_NAME}-latest
-
-      - name: Push Docker images
-        env:
-          BRANCH_NAME: ${{ github.ref_name }}
-          SHORT_HASH: ${{ github.sha }}
-        run: |
-          docker push gitea.7o7.cx/kittyteam/kittybe:${BRANCH_NAME}-${SHORT_HASH:0:5}
-          docker push gitea.7o7.cx/kittyteam/kittybe:${BRANCH_NAME}-latest
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          platforms: |
+            linux/amd64
+            linux/arm64
+          pull: true
+          push: true
+          tags: |
+            gitea.7o7.cx/kittyteam/kittybe:${{ steps.vars.outputs.branch_name }}-${{ steps.vars.outputs.short_hash }}
+            gitea.7o7.cx/kittyteam/kittybe:${{ steps.vars.outputs.branch_name }}-latest
 
       - name: Log out from registry
         if: always()