update CI to work with composer-auth

.github/workflows/ci.yml

@@ -22,8 +22,18 @@ jobs:
     - name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v2
 
+    - name: Prepare Composer Auth Secret
+      run: |
+        if [[ -n "${{ secrets._GITHUB_AUTH_TOKEN }}" ]]; then
+          echo '{"github-oauth": {"github.com": "'${{ secrets._GITHUB_AUTH_TOKEN }}'"}}' > composer-auth.json
+        else
+          echo '{}' > composer-auth.json
+        fi
+
     - name: Build and Release
       uses: docker/bake-action@v2
       with:
         files: |
           ./docker-bake.hcl
+        secrets: |
+          composer_auth=./composer-auth.json