Heroku 在尝试运行我的 node.js discord bot 时出错

Question

当我的机器人通过 vsc 运行时，它运行良好，没有错误，一旦我上传到 heroku 进行托管，我将我的配置变量设置为需要，但是在启动 dynos 时我遇到了这个错误，不知道为什么它可以找不到命令处理程序，因为它在本地运行时工作正常。任何帮助都会很棒，第一次尝试通过 heroku 托管，所以也许我做错了什么。

2021-01-29T00:10:59.407833+00:00 heroku[Worker.1]: Process exited with status 1
2021-01-29T00:10:59.444041+00:00 heroku[Worker.1]: State changed from up to crashed
2021-01-29T00:10:59.451018+00:00 heroku[Worker.1]: State changed from crashed to starting
2021-01-29T00:10:59.357002+00:00 app[Worker.1]: internal/modules/cjs/loader.js:818
2021-01-29T00:10:59.357022+00:00 app[Worker.1]:   throw err;
2021-01-29T00:10:59.357023+00:00 app[Worker.1]:   ^
2021-01-29T00:10:59.357023+00:00 app[Worker.1]: 
2021-01-29T00:10:59.357024+00:00 app[Worker.1]: Error: Cannot find module './handlers/command_handler'
2021-01-29T00:10:59.357024+00:00 app[Worker.1]: Require stack:
2021-01-29T00:10:59.357025+00:00 app[Worker.1]: - /app/main.js
2021-01-29T00:10:59.357025+00:00 app[Worker.1]:     at Function.Module._resolveFilename (internal/modules/cjs/loader.js:815:15)
2021-01-29T00:10:59.357030+00:00 app[Worker.1]:     at Function.Module._load (internal/modules/cjs/loader.js:667:27)
2021-01-29T00:10:59.357030+00:00 app[Worker.1]:     at Module.require (internal/modules/cjs/loader.js:887:19)
2021-01-29T00:10:59.357031+00:00 app[Worker.1]:     at require (internal/modules/cjs/helpers.js:74:18)
2021-01-29T00:10:59.357031+00:00 app[Worker.1]:     at /app/main.js:11:5
2021-01-29T00:10:59.357032+00:00 app[Worker.1]:     at Array.forEach (<anonymous>)
2021-01-29T00:10:59.357032+00:00 app[Worker.1]:     at Object.<anonymous> (/app/main.js:10:38)
2021-01-29T00:10:59.357032+00:00 app[Worker.1]:     at Module._compile (internal/modules/cjs/loader.js:999:30)
2021-01-29T00:10:59.357033+00:00 app[Worker.1]:     at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10)
2021-01-29T00:10:59.357033+00:00 app[Worker.1]:     at Module.load (internal/modules/cjs/loader.js:863:32) {
2021-01-29T00:10:59.357034+00:00 app[Worker.1]:   code: 'MODULE_NOT_FOUND',
2021-01-29T00:10:59.357034+00:00 app[Worker.1]:   requireStack: [ '/app/main.js' ]
2021-01-29T00:10:59.357034+00:00 app[Worker.1]: }