CHORE(docker): use standard docker build

- Use standard docker build for DinD compatibility
- Simplify build process

.gitea/workflows/build.yml

@@ -26,9 +26,6 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
 
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-
       - name: Log in to Gitea Container Registry
         uses: docker/login-action@v3
         with:
@@ -56,16 +53,31 @@ jobs:
 
       - name: Build and push Docker image
         id: build
-        uses: docker/build-push-action@v5
-        with:
-          context: ./services/nextjs
-          file: ./deploy/docker/Dockerfile.prod
-          push: true
-          platforms: linux/arm64
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
+        run: |
+          TAGS="${{ steps.meta.outputs.tags }}"
+
+          # Build the image
+          docker build \
+            -t $(echo "$TAGS" | head -n 1) \
+            -f ./deploy/docker/Dockerfile.prod \
+            ./services/fastapi
+
+          # Tag all versions
+          FIRST_TAG=$(echo "$TAGS" | head -n 1)
+          echo "$TAGS" | while read tag; do
+            if [ "$tag" != "$FIRST_TAG" ]; then
+              docker tag "$FIRST_TAG" "$tag"
+            fi
+          done
+
+          # Push all tags
+          echo "$TAGS" | while read tag; do
+            docker push "$tag"
+          done
+
+          # Get digest
+          DIGEST=$(docker inspect --format='{{index .RepoDigests 0}}' "$FIRST_TAG" | cut -d'@' -f2)
+          echo "digest=$DIGEST" >> $GITHUB_OUTPUT
 
       - name: Extract SHA tag
         id: extract-tag