我第一次尝试使用Elastic bean stalk部署我的代码。我创建了一个小节点的Web服务，该服务在本地运行良好，但是当我在Elastic beantalk中部署该代码时，出现错误。 我是AWS的新手。任何帮助将不胜感激。
Require stack:
Aug 13 06:36:49 ip-172-31-94-42 web: - /var/app/current/app.js
Aug 13 06:36:49 ip-172-31-94-42 web: at Function.Module._resolveFilename (internal/modules/cjs/loader.js:965:15)
Aug 13 06:36:49 ip-172-31-94-42 web: at Function.Module._load (internal/modules/cjs/loader.js:841:27)
Aug 13 06:36:49 ip-172-31-94-42 web: at Module.require (internal/modules/cjs/loader.js:1025:19)
Aug 13 06:36:49 ip-172-31-94-42 web: at require (internal/modules/cjs/helpers.js:72:18)
Aug 13 06:36:49 ip-172-31-94-42 web: at Object.<anonymous> (/var/app/current/app.js:1:15)
Aug 13 06:36:49 ip-172-31-94-42 web: at Module._compile (internal/modules/cjs/loader.js:1137:30)
Aug 13 06:36:49 ip-172-31-94-42 web: at Object.Module._extensions..js (internal/modules/cjs/loader.js:1157:10)
Aug 13 06:36:49 ip-172-31-94-42 web: at Module.load (internal/modules/cjs/loader.js:985:32)
Aug 13 06:36:49 ip-172-31-94-42 web: at Function.Module._load (internal/modules/cjs/loader.js:878:14)
Aug 13 06:36:49 ip-172-31-94-42 web: at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12) {
Aug 13 06:36:49 ip-172-31-94-42 web: code: 'MODULE_NOT_FOUND',
Aug 13 06:36:49 ip-172-31-94-42 web: requireStack: [ '/var/app/current/app.js' ]
Aug 13 06:36:49 ip-172-31-94-42 web: }
Aug 13 06:36:50 ip-172-31-94-42 web: internal/modules/cjs/loader.js:968
Aug 13 06:36:50 ip-172-31-94-42 web: throw err;
Aug 13 06:36:50 ip-172-31-94-42 web: ^
Aug 13 06:36:50 ip-172-31-94-42 web: Error: Cannot find module 'express'