Add Docker login for GitHub Actions cache authentication

Co-authored-by: dannystaple <426859+dannystaple@users.noreply.github.com>

Author: Copilot

.github/workflows/on_call_build_site.yaml

@@ -11,6 +11,13 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
+      - name: Login to Docker
+        uses: docker/login-action@74a5d142397b4f367a81961eba4e8cd7edddf772 # v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ github.token }}
+
       - name: Build the site with docker compose
         run: |
           docker compose -f docker-compose.yml -f docker-compose.ci.yml run --build build

.github/workflows/on_call_staging_test.yaml

@@ -18,6 +18,13 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
+      - name: Login to Docker
+        uses: docker/login-action@74a5d142397b4f367a81961eba4e8cd7edddf772 # v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ github.token }}
+
       - name: Prepare staging context  
         run: |
           # Copy staging files into the _site directory for the docker build