Run build action on PRs

Author: andersonshatch

.github/workflows/docker-image.yml

@@ -3,6 +3,9 @@ name: Docker Image CI
 on:
   push:
     branches: [ main ]
+    tags: ["v*"]
+  pull_request:
+    branches: ["main"]
 
 env:
   REGISTRY: ghcr.io
@@ -44,6 +47,6 @@ jobs:
         with:
           context: .
           platforms: linux/amd64, linux/arm64
-          push: true
+          push: ${{ github.event_name == 'push' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}