build image only on new release tag

.github/workflows/ghcr.yml

@@ -1,12 +1,9 @@
 # build and push releases to ghcr
-# build for PRs only to test failures
-
 name: build-and-push-ghcr
 
 on:
   push:
     tags: ["v*"]
-  pull_request:
 
 permissions:
   contents: read
@@ -30,7 +27,6 @@ jobs:
         uses: docker/setup-buildx-action@v3
 
       - name: Log in to GHCR
-        if: github.event_name != 'pull_request'
         uses: docker/login-action@v3
         with:
           registry: ghcr.io
@@ -48,21 +44,7 @@ jobs:
             # Optional: also publish :latest for version tags
             type=raw,value=latest
 
-      - name: Build (PR)
-        if: github.event_name == 'pull_request'
-        uses: docker/build-push-action@v6
-        with:
-          context: .
-          file: ./Dockerfile
-          push: false
-          platforms: linux/amd64,linux/arm64
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
-
-      - name: Build and push (tag)
-        if: github.event_name != 'pull_request'
+      - name: Build and push
         uses: docker/build-push-action@v6
         with:
           context: .