feat: trigger GHCR image publishing on main branch push (#1749)

* feat: trigger GHCR image publishing on main branch push

* feat: limit auto-trigger to original repo

Also reflects the new state to the docs

---------

Co-authored-by: Marcelo Robert Santos <marcelo.santos@profusion.mobi>

Author: gustavobtflores

.github/workflows/deploy-containers.yaml

@@ -1,6 +1,9 @@
 name: Publish GHCR Images
 
 on:
+  push:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
@@ -16,6 +19,7 @@ env:
 
 jobs:
   build-and-push-backend:
+    if: github.repository == 'kernelci/dashboard' || github.event_name == 'workflow_dispatch'
     runs-on: ubuntu-latest
     outputs:
       digest: ${{ steps.build.outputs.digest }}
@@ -47,6 +51,7 @@ jobs:
             ${{ steps.meta.outputs.prefix }}/dashboard-backend:${{ github.sha }}
 
   build-and-push-dashboard:
+    if: github.repository == 'kernelci/dashboard' || github.event_name == 'workflow_dispatch'
     runs-on: ubuntu-latest
     outputs:
       digest: ${{ steps.build.outputs.digest }}
@@ -79,6 +84,7 @@ jobs:
             ${{ steps.meta.outputs.prefix }}/dashboard-frontend:${{ github.sha }}
 
   build-and-push-proxy:
+    if: github.repository == 'kernelci/dashboard' || github.event_name == 'workflow_dispatch'
     runs-on: ubuntu-latest
     outputs:
       digest: ${{ steps.build.outputs.digest }}

README.md

@@ -145,7 +145,7 @@ The workflow `.github/workflows/deploy-containers.yaml` publishes Docker images
 - `dashboard-frontend` (from `./dashboard/Dockerfile`)
 - `dashboard-proxy` (from `./proxy`)
 
-This workflow is manual for now (`workflow_dispatch`) and pushes images to GHCR under `ghcr.io/<owner>/<repo>` with two tags for each image:
+This workflow is triggered on pushes to main (on the original repository) and also manually (`workflow_dispatch`) and pushes images to GHCR under `ghcr.io/<owner>/<repo>` with two tags for each image:
 
 - `latest`
 - `${{ github.sha }}`