Break gateway build cycle with runtime base bootstrap

.gitea/workflows/gateway-build.yml

@@ -8,6 +8,7 @@ on:
 env:
   DEPLOY_PATH: /opt/vpn-proxy
   BASE_IMAGE: vpn-proxy-runtime-base:bookworm-slim
+  RUNTIME_BASE_SOURCE_IMAGE: mirror.gcr.io/library/debian:bookworm-slim
   SINGBOX_VERSION: 1.12.13
 
 jobs:
@@ -34,6 +35,7 @@ jobs:
           DEPLOY_HOST=111 \
           DEPLOY_PATH="${{ env.DEPLOY_PATH }}" \
           BASE_IMAGE="${{ env.BASE_IMAGE }}" \
+          RUNTIME_BASE_SOURCE_IMAGE="${{ env.RUNTIME_BASE_SOURCE_IMAGE }}" \
           SINGBOX_VERSION="${{ env.SINGBOX_VERSION }}" \
           IMAGE_TAG="${{ gitea.sha }}" \
           bash scripts/build-on-107-deploy-111.sh