added a clone step

.forgejo/workflows/container-build.yml

@@ -11,7 +11,11 @@ jobs:
         KC_HTTPS_CLIENT_AUTH: request
         KC_FEATURES: recovery-codes,passkeys,opentelemetry
     steps:
-      - uses: actions/checkout@v3
+      - run: |
+          apt install git
+          git init
+          git remote add origin "${{ github.repository }}"
+          git pull --depth=1
       - run: kc.sh build
         working-directory: /opt/keycloak/
       - id: artifact-upload