fix: nginx build context, playout health check retry loop

.gitea/workflows/ci.yml

@@ -119,13 +119,23 @@ jobs:
             type=raw,value=latest,enable={{is_default_branch}}
 
       - name: Build and push Nginx image
-        uses: docker/build-push-action@v5
-        with:
-          context: .
-          dockerfile: infrastructure/nginx/Dockerfile
-          push: true
-          tags: ${{ steps.meta-nginx.outputs.tags }}
-          labels: ${{ steps.meta-nginx.outputs.labels }}
+        run: |
+          TAGS="${{ steps.meta-nginx.outputs.tags }}"
+          LABELS="${{ steps.meta-nginx.outputs.labels }}"
+          TAG_ARGS=""
+          for tag in $TAGS; do
+            TAG_ARGS="$TAG_ARGS --tag $tag"
+          done
+          LABEL_ARGS=""
+          while IFS= read -r label; do
+            [ -n "$label" ] && LABEL_ARGS="$LABEL_ARGS --label $label"
+          done <<< "$LABELS"
+          docker buildx build \
+            --push \
+            --file infrastructure/nginx/Dockerfile \
+            $TAG_ARGS \
+            $LABEL_ARGS \
+            .
 
   release:
     needs: docker