fix: detect buildkit bootstrap failure and fallback to docker driver

.gitea/actions/docker-build/action.yml

@@ -75,20 +75,28 @@ runs:
         chmod +x $HOME/.docker/cli-plugins/docker-buildx
         docker buildx version
 
+        # Clean up any existing broken builder
+        docker buildx rm -f gitea-builder 2>/dev/null || true
+
         # Try docker-container driver first (for multi-platform), fall back to docker driver
-        BUILDER_SETUP=false
-        if docker buildx create \
+        OUTPUT=$(docker buildx create \
           --name gitea-builder \
           --driver docker-container \
           --driver-opt image=moby/buildkit:buildx-stable-1 \
           --driver-opt network=host \
-          --use 2>&1; then
-          if docker buildx inspect --bootstrap 2>&1; then
-            BUILDER_SETUP=true
-          fi
+          --use 2>&1)
+        echo "$OUTPUT"
+
+        if echo "$OUTPUT" | grep -qi "error\|failed\|permission\|denied"; then
+          # docker-container failed, fall back to docker driver
+          docker buildx rm -f gitea-builder 2>/dev/null || true
+          docker buildx create --name gitea-builder --driver docker --use
         fi
 
-        if [ "$BUILDER_SETUP" != "true" ]; then
+        # Verify builder works
+        INSPECT_OUTPUT=$(docker buildx inspect --bootstrap 2>&1) || true
+        echo "$INSPECT_OUTPUT"
+        if echo "$INSPECT_OUTPUT" | grep -qi "error\|failed"; then
           docker buildx rm -f gitea-builder 2>/dev/null || true
           docker buildx create --name gitea-builder --driver docker --use
           docker buildx inspect --bootstrap