chore: update deployment workflow to enable Docker BuildKit and set environment variables for production

.gitea/workflows/deploy.yml

@@ -13,5 +13,13 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Deploy stack
+        env:
+          DOCKER_BUILDKIT: 1
+          COMPOSE_DOCKER_CLI_BUILD: 1
+          NEXTAUTH_SECRET: ${{ secrets.NEXTAUTH_SECRET }}
+          NEXTAUTH_URL: ${{ secrets.NEXTAUTH_URL }}
+          ADMIN_DEFAULT_PASSWORD: ${{ secrets.ADMIN_DEFAULT_PASSWORD }}
+          DATABASE_URL: ${{ secrets.DATABASE_URL }}
+          NODE_ENV: production
         run: |
           docker compose up -d --build