ci: build simulator image on branch checks

Author: steebchen

.github/workflows/publish-image.yml

@@ -3,9 +3,10 @@ name: Publish Image
 on:
   push:
     branches:
-      - main
+      - "**"
     tags:
       - "v*"
+  pull_request:
   workflow_dispatch:
 
 permissions:
@@ -47,6 +48,6 @@ jobs:
           context: .
           file: ./Dockerfile
           platforms: linux/amd64
-          push: true
+          push: ${{ github.event_name != 'pull_request' && (github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/v')) }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}