Switch production deployment from Docker to PM2 on Ubuntu.

Add Express gateway, ecosystem config, and one-click install with native PostgreSQL, Node, and Python venv on port 23566.

Co-authored-by: Cursor <cursoragent@cursor.com>

deploy/uninstall.sh

@@ -1,28 +1,11 @@
-#!/usr/bin/env bash
-#
-# 停止并移除容器（默认保留数据卷与 uploads）
-# 版权所有 (c) 马建军
-#
-set -euo pipefail
-
-INSTALL_DIR="${INSTALL_DIR:-/opt/secondary-school-grade-archive}"
-REMOVE_VOLUMES="${REMOVE_VOLUMES:-0}"
-
-cd "${INSTALL_DIR}" || exit 1
-
-echo "将停止 Docker 服务…"
-if [[ "${REMOVE_VOLUMES}" == "1" ]]; then
-  echo "警告: 将删除数据库卷（所有成绩数据会丢失）"
-  read -r -p "确认删除数据卷? 输入 yes: " ans
-  if [[ "${ans}" == "yes" ]]; then
-    docker compose --env-file .env down -v
-  else
-    echo "已取消"
-    exit 1
-  fi
-else
-  docker compose --env-file .env down
-  echo "数据卷与 ${INSTALL_DIR}/uploads 已保留"
-fi
-
-echo "卸载完成。源码目录 ${INSTALL_DIR} 未自动删除，如需删除请手动 rm -rf"
+#!/usr/bin/env bash
+set -euo pipefail
+
+INSTALL_DIR="${INSTALL_DIR:-/opt/secondary-school-grade-archive}"
+
+cd "${INSTALL_DIR}" || exit 1
+pm2 delete grade-api grade-web 2>/dev/null || true
+pm2 save --force
+
+echo "PM2 服务已停止。PostgreSQL 数据与 ${INSTALL_DIR}/uploads 仍保留。"
+echo "如需删除源码: rm -rf ${INSTALL_DIR}"