fix: add step to create .env file from Gitea secret in deployment workflow

.gitea/workflows/deploy.yml

@@ -12,6 +12,9 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
 
+      - name: Create .env file from Gitea secret
+        run: echo "${{ secrets.BACKEND_ENV }}" > backand/.env
+
       - name: Build and restart Docker containers
         run: |
           docker compose down