Update Dockerfile

Dockerfile

@@ -52,7 +52,7 @@ ENV POSTGRES_USER=${POSTGRES_USER} \
     DB_POSTGRESDB_USER=${POSTGRES_USER} \
     DB_POSTGRESDB_PASSWORD=${POSTGRES_PASSWORD} \
     DB_POSTGRESDB_DATABASE=${POSTGRES_DB} \
-    ENV VIRTUAL_ENV=$WORKDIR/venv
+    VIRTUAL_ENV=$WORKDIR/venv
     PATH="$VIRTUAL_ENV/bin:/usr/local/lib/node_modules/n8n/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:$PATH"
 
 # 复制构建阶段的 Node.js 和 n8n