running staging build only if manually triggerd or pr against master branch is approved

Author: ag060

.github/workflows/staging.yml

@@ -5,10 +5,12 @@ on:
   push:
     branches: [master]
   pull_request:
+    types: [ submitted ]
   workflow_dispatch:
 
 jobs:
   build:
+    if: (github.event.pull_request.base.ref == 'master' && github.event.review.state == 'approved') || (github.event_name == 'workflow_dispatch')
     runs-on: ubuntu-22.04
     outputs:
       IMAGE_TAG: ${{ steps.docker_tag.outputs.IMAGE_TAG }}