express 热部署，修改不重新启动

npm install -g node-dev

package.json 修改如下

{  "name": "server",  "version": "0.0.0",  "private": true,  "scripts": {    "start": "node ./bin/www",    "dev":"node-dev ./bin/www"  },  "dependencies": {    "archiver": "^1.3.0",    "body-parser": "^1.17.2",    "cookie-parser": "~1.4.3",    "debug": "~2.6.3",    "express": "~4.15.2",    "express-session": "^1.15.3",    "jade": "~1.11.0",    "md5": "^2.2.1",    "morgan": "~1.8.1",    "serve-favicon": "~2.4.2"  }}

用 npm run dev 启动