ci(gha): enable periodic rebuild of the images (#217)

Related to #216

Author: mfocko

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

@@ -5,6 +5,8 @@ on:
       - main
       - stable
   workflow_dispatch:
+  schedule:
+    - cron: "0 0 10 * *"
 
 jobs:
   build-n-push:
@@ -20,7 +22,8 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
-      - name: Extract branch name and set tag
+      - name: Extract branch name and set tag when triggered via push
+        if: "!github.event.schedule"
         shell: bash
         run: |
           branch=${GITHUB_REF#refs/heads/}
@@ -33,10 +36,29 @@ jobs:
                   tag="prod"
                   ;;
           esac
+          unique_tag="${branch}-${GITHUB_SHA::7}"
+
           echo "branch=${branch}" >> $GITHUB_OUTPUT
+          echo "tag=${tag} ${unique_tag}" >> $GITHUB_OUTPUT
+
+        id: branch_tag_push
+
+      - name: Extract branch name and set tags when triggered via schedule
+        if: github.event.schedule
+        shell: bash
+        run: |
+          # Do not rely on hard-coded `main`
+          branch=${GITHUB_REF#refs/heads/}
+
+          # Set all tags during periodic rebuild
+          tag="prod stg latest"
           unique_tag="${branch}-${GITHUB_SHA::7}"
+
+          # Propagate changes to outputs
+          echo "branch=${branch}" >> $GITHUB_OUTPUT
           echo "tag=${tag} ${unique_tag}" >> $GITHUB_OUTPUT
-        id: branch_tag
+
+        id: branch_tag_schedule
 
       - name: Build Image
         id: build-image