Switch frontend container to production-aware runtime mode

docker-compose.yml

@@ -151,6 +151,7 @@ services:
         NPM_FETCH_RETRY_MAXTIMEOUT: ${NPM_FETCH_RETRY_MAXTIMEOUT:-120000}
         NPM_FETCH_TIMEOUT: ${NPM_FETCH_TIMEOUT:-300000}
     environment:
+      APP_ENV: ${APP_ENV:-development}
       VITE_API_BASE: ${VITE_API_BASE:-}
       CORS_ORIGINS: '${CORS_ORIGINS:-["http://localhost:5173","http://localhost:3000"]}'
       VITE_ALLOWED_HOSTS: ${VITE_ALLOWED_HOSTS:-}