发现问题
最近同事问了一个问题，他在用node.js的时候，发现node.js报错了，错误显示：
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Error: Cannot find module 'ejs'
at Function.Module._resolveFilename (module.js:325:15)
at Function.Module._load (module.js:276:25)
at Module.require (module.js:353:17)
at require (internal/module.js:12:17)
at new View (d:\WebClient\webstormSpace\day6shuoshuo\node_modules\express\lib\view.js:78:30)
at EventEmitter.render (d:\WebClient\webstormSpace\day6shuoshuo\node_modules\express\lib\application.js:569:12)
at ServerResponse.render (d:\WebClient\webstormSpace\day6shuoshuo\node_modules\express\lib\response.js:961:7)
at exports.showIndex (d:\WebClient\webstormSpace\day6shuoshuo\routes\router.js:7:9)
at Layer.handle [as handle_request] (d:\WebClient\webstormSpace\day6shuoshuo\node_modules\express\lib\router\layer.js:95:5)
at next (d:\WebClient\webstormSpace\day6shuoshuo\node_modules\express\lib\router\route.js:131:13)
后来通过查找资料，发现原因是因为：没有安装ejs模块
解决办法：
cmd进入到项目目录，安装ejs：npm install --save ejs