Update manual-build-push.yml

Author: danpaul81

.github/workflows/manual-build-push.yml

@@ -4,7 +4,12 @@ name: image-build-and-publish
 # They are provided by a third-party and are governed by 
 # separate terms of service, privacy policy, and support
 # documentation.
-
+on:
+  push:
+    branches: [ "dev" ]
+    # Publish  tags as releases.
+    tags: [ '*' ]
+    
 env:
   # Use docker.io for Docker Hub if empty
   REGISTRY: ghcr.io