Node.js multi-main中出现错误，无法获取/dist/bundle.js

我是react.js的新手。我在生产中遇到了这个错误，但在开发中使用了相同的代码。有人能帮我吗。当我在开发中运行此代码时。每次webpack生成并生成dist文件夹时，此文件夹有一个bundle.js，但webpack不是在生产中生成的

 /home/ubuntu/.pm2/logs/server-out-0.log last 10 lines:
   0|server   | Version: webpack 1.13.2
   0|server   | Time: 566ms
   0|server   |     Asset     Size  Chunks             Chunk Names
   0|server   | bundle.js  1.52 kB       0  [emitted]  main
   0|server   | chunk    {0} bundle.js (main) 28 bytes [rendered]
   0|server   |     [0] multi main 28 bytes {0} [built] [1 error]
   0|server   | 
   0|server   | ERROR in multi main
   0|server   | Module not found:
   Error:Cannot resolve 'file' or   'directory'
  ./client/index.html in /var/www/html/AR/server
   0|server   |  @ multi main


  [STREAMING] Now streaming realtime logs for [all] processes
  0|server   | Error: Cannot GET /dist/bundle.js
  0|server   |     at raiseUrlNotFoundError       

 (/var/www/html/AR/node_modules/loopback/server/middleware/url-not-   

found.js:20:17)
0|server   |     at Layer.handle [as handle_request]   

(/var/www/html/AR/node_modules/express/lib/router/layer.js:95:5)
 0|server   |     at trim_prefix    

 (/var/www/html/AR/node_modules/express/lib/router/index.js:312:13)
 0|server   |     at   
 /var/www/html/AR/node_modules/express/lib/router/index.js:280:7
 0|server   |     at Function.process_params    

 (/var/www/html/AR/node_modules/express/lib/router/index.js:330:12)
 0|server   |     at next    

 (/var/www/html/AR/node_modules/express/lib/router/index.js:271:10)
 0|server   |     at SendStream.error   

(/var/www/html/AR/node_modules/express/node_modules/serve-   

static/index.js:121:7)
0|server   |     at emitOne (events.js:96:13)
0|server   |     at SendStream.emit (events.js:188:7)
0|server   |     at SendStream.error  

  (/var/www/html/AR/node_modules/express/node_modules/send/index.js:275:17)

谢谢