Scope documentation CI and isolate delivery job resources

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

@@ -20,13 +20,26 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Select relevant delivery work
+        id: delivery
+        env:
+          DELIVERY_EVENT: ${{ github.event_name }}
+          DELIVERY_REF: ${{ github.ref }}
+          DELIVERY_SHA: ${{ github.sha }}
+          DELIVERY_BASE: ${{ github.event.pull_request.base.sha || github.event.before }}
+        run: |
+          cd .
+          bash scripts/ci-select.sh
       - name: Set up QEMU
+        if: ${{ steps.delivery.outputs.run == 'true' }}
         uses: docker/setup-qemu-action@v3
 
       - name: Set up Docker Buildx
+        if: ${{ steps.delivery.outputs.run == 'true' }}
         uses: docker/setup-buildx-action@v3
 
       - name: Log in to Gitea registry
+        if: ${{ steps.delivery.outputs.run == 'true' }}
         uses: docker/login-action@v3
         with:
           registry: ${{ env.REGISTRY }}
@@ -34,6 +47,7 @@ jobs:
           password: ${{ secrets.REGISTRY_PASSWORD }}
 
       - name: Prepare image tags
+        if: ${{ steps.delivery.outputs.run == 'true' }}
         id: prep
         shell: bash
         run: |
@@ -56,6 +70,7 @@ jobs:
           } >> "$GITHUB_OUTPUT"
 
       - name: Build and push image
+        if: ${{ steps.delivery.outputs.run == 'true' }}
         uses: docker/build-push-action@v6
         with:
           context: .