fix: ensure .env is visible to docker compose up for environment variable interpolation

.gitea/workflows/deploy-demo.yaml

@@ -12,6 +12,11 @@ jobs:
       - name: Checkout Code
         uses: actions/checkout@v3
 
+      - name: Step 0 - Prepare Environment
+        run: |
+          # 從宿主機固定路徑把持久化的 .env 移回當前工作目錄，供 docker compose 使用
+          docker run --rm -v /workspace/mama/star-cloud/.env:/tmp/.env:ro busybox cat /tmp/.env > .env
+
       - name: Step 1 - Build & Deploy Containers
         run: |
           WWWGROUP=1000 WWWUSER=1000 docker compose -f compose.yaml up -d --build --wait