fix workflow

Author: Fly.io CI

.github/workflows/docker-build.yml

@@ -34,14 +34,12 @@ jobs:
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
-
       - name: Log in to Docker Hub
         if: github.event_name != 'pull_request'
         uses: docker/login-action@v3
         with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-
+          username: ${{ secrets.FLYIOBUILDS_DOCKERHUB_USERNAME }}
+          password: ${{ secrets.FLYIOBUILDS_DOCKERHUB_TOKEN }}
       - name: Extract metadata (tags, labels) for Docker
         id: meta
         uses: docker/metadata-action@v5
@@ -64,8 +62,16 @@ jobs:
           context: .
           file: ./build/postgres-operator/Dockerfile
           push: ${{ github.event_name != 'pull_request' }}
-          platforms: linux/amd64,linux/arm64
+          load: ${{ github.event_name == 'pull_request' }}
+          platforms: ${{ github.event_name != 'pull_request' && 'linux/amd64,linux/arm64' || 'linux/amd64' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha
-          cache-to: type=gha,mode=max
+          cache-to: type=gha,mode=max
+
+      # For pull requests, we want to test the image
+      - name: Test image
+        if: github.event_name == 'pull_request'
+        run: |
+          docker image inspect ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:pr-${{ github.event.pull_request.number }}
+          # Add any additional test commands here