我正在构建Framework7应用程序，并希望将其部署在heroku中以便提交功课。我遵循了使用Heroku CLI在Heroku Deploy中给出的步骤。它可以成功编译并正确构建，但是我遇到了上述错误。
下面是日志：
2019-09-13T02:11:50.997471+00:00 heroku[web.1]: Starting process with command `npm start`
2019-09-13T02:11:51.000000+00:00 app[api]: Build succeeded
2019-09-13T02:11:53.328087+00:00 app[web.1]:
2019-09-13T02:11:53.328110+00:00 app[web.1]: > bus-ar@1.0.0 start /app
2019-09-13T02:11:53.328111+00:00 app[web.1]: > npm run dev
2019-09-13T02:11:53.328113+00:00 app[web.1]:
2019-09-13T02:11:53.854346+00:00 app[web.1]:
2019-09-13T02:11:53.854374+00:00 app[web.1]: > bus-ar@1.0.0 dev /app
2019-09-13T02:11:53.854377+00:00 app[web.1]: > cross-env NODE_ENV=development webpack-dev-server --config ./build/webpack.config.js
2019-09-13T02:11:53.854379+00:00 app[web.1]:
2019-09-13T02:11:56.426292+00:00 app[web.1]: ℹ ｢wds｣: Project is running at http://localhost:8080/
2019-09-13T02:11:56.427099+00:00 app[web.1]: ℹ ｢wds｣: webpack output is served from /
2019-09-13T02:11:56.427248+00:00 app[web.1]: ℹ ｢wds｣: Content not from webpack is served from /www/
2019-09-13T02:12:17.535441+00:00 app[web.1]: ℹ ｢wdm｣: Hash: 0751dcdbf7b4af204339
2019-09-13T02:12:17.535467+00:00 app[web.1]: Version: webpack 4.39.3
2019-09-13T02:12:17.535470+00:00 app[web.1]: Time: 21103ms
2019-09-13T02:12:17.535472+00:00 app[web.1]: Built at: 09/13/2019 2:12:17 AM
2019-09-13T02:12:17.535477+00:00 app[web.1]: Asset Size Chunks Chunk Names
2019-09-13T02:12:17.535479+00:00 app[web.1]: ./index.html 6.26 KiB [emitted]
2019-09-13T02:12:17.535481+00:00 app[web.1]: fonts/Framework7Icons-Regular.eot 88 KiB [emitted]
2019-09-13T02:12:17.535483+00:00 app[web.1]: fonts/Framework7Icons-Regular.ttf 87.8 KiB [emitted]
2019-09-13T02:12:17.535484+00:00 app[web.1]: fonts/Framework7Icons-Regular.woff 43.4 KiB [emitted]
2019-09-13T02:12:17.535486+00:00 app[web.1]: fonts/Framework7Icons-Regular.woff2 34 KiB [emitted]
2019-09-13T02:12:17.535488+00:00 app[web.1]: fonts/MaterialIcons-Regular.eot 140 KiB [emitted]
2019-09-13T02:12:17.535491+00:00 app[web.1]: fonts/MaterialIcons-Regular.ttf 125 KiB [emitted]
2019-09-13T02:12:17.535493+00:00 app[web.1]: fonts/MaterialIcons-Regular.woff 56.3 KiB [emitted]
2019-09-13T02:12:17.535495+00:00 app[web.1]: fonts/MaterialIcons-Regular.woff2 43.3 KiB [emitted]
2019-09-13T02:12:17.535497+00:00 app[web.1]: js/app.js 2.87 MiB main [emitted] main
2019-09-13T02:12:17.535499+00:00 app[web.1]: static/icons/128x128.png 17.4 KiB [emitted]
2019-09-13T02:12:17.535501+00:00 app[web.1]: static/icons/144x144.png 20.9 KiB [emitted]
2019-09-13T02:12:17.535504+00:00 app[web.1]: static/icons/152x152.png 22.9 KiB [emitted]
2019-09-13T02:12:17.535506+00:00 app[web.1]: static/icons/192x192.png 32.7 KiB [emitted]
2019-09-13T02:12:17.535508+00:00 app[web.1]: static/icons/256x256.png 52.3 KiB [emitted]
2019-09-13T02:12:17.535510+00:00 app[web.1]: static/icons/512x512.png 169 KiB [emitted]
2019-09-13T02:12:17.535512+00:00 app[web.1]: static/icons/apple-touch-icon.png 69.8 KiB [emitted]
2019-09-13T02:12:17.535514+00:00 app[web.1]: static/icons/favicon.png 36.3 KiB [emitted]
2019-09-13T02:12:17.535516+00:00 app[web.1]: Entrypoint main = js/app.js
2019-09-13T02:12:17.535529+00:00 app[web.1]: [1] multi (webpack)-dev-server/client?http://localhost:8080 (webpack)/hot/dev-server.js ./src/js/app.js 52 bytes {main} [built]
2019-09-13T02:12:17.535532+00:00 app[web.1]: [./node_modules/dom7/dist/dom7.module.js] 45.4 KiB {main} [built]
2019-09-13T02:12:17.535534+00:00 app[web.1]: [./node_modules/framework7/css/framework7.bundle.css] 963 bytes {main} [built]
2019-09-13T02:12:17.535536+00:00 app[web.1]: [./node_modules/framework7/framework7.esm.bundle.js] 5.69 KiB {main} [built]
2019-09-13T02:12:17.535538+00:00 app[web.1]: [./node_modules/strip-ansi/index.js] 161 bytes {main} [built]
2019-09-13T02:12:17.535543+00:00 app[web.1]: [./node_modules/webpack-dev-server/client/index.js?http://localhost:8080] (webpack)-dev-server/client?http://localhost:8080 4.29 KiB {main} [built]
2019-09-13T02:12:17.535545+00:00 app[web.1]: [./node_modules/webpack-dev-server/client/overlay.js] (webpack)-dev-server/client/overlay.js 3.51 KiB {main} [built]
2019-09-13T02:12:17.535547+00:00 app[web.1]: [./node_modules/webpack-dev-server/client/socket.js] (webpack)-dev-server/client/socket.js 1.53 KiB {main} [built]
2019-09-13T02:12:17.535549+00:00 app[web.1]: [./node_modules/webpack-dev-server/client/utils/createSocketUrl.js] (webpack)-dev-server/client/utils/createSocketUrl.js 2.85 KiB {main} [built]
2019-09-13T02:12:17.535551+00:00 app[web.1]: [./node_modules/webpack-dev-server/client/utils/log.js] (webpack)-dev-server/client/utils/log.js 964 bytes {main} [built]
2019-09-13T02:12:17.535556+00:00 app[web.1]: [./node_modules/webpack-dev-server/client/utils/reloadApp.js] (webpack)-dev-server/client/utils/reloadApp.js 1.59 KiB {main} [built]
2019-09-13T02:12:17.535558+00:00 app[web.1]: [./node_modules/webpack-dev-server/client/utils/sendMessage.js] (webpack)-dev-server/client/utils/sendMessage.js 402 bytes {main} [built]
2019-09-13T02:12:17.535563+00:00 app[web.1]: [./node_modules/webpack/hot sync ^\.\/log$] (webpack)/hot sync nonrecursive ^\.\/log$ 170 bytes {main} [built]
2019-09-13T02:12:17.535567+00:00 app[web.1]: [./node_modules/webpack/hot/dev-server.js] (webpack)/hot/dev-server.js 1.59 KiB {main} [built]2019-09-13T02:12:17.535570+00:00 app[web.1]: [./src/js/app.js] 2.92 KiB {main} [built]
2019-09-13T02:12:17.535572+00:00 app[web.1]: + 299 hidden modules
2019-09-13T02:12:17.535574+00:00 app[web.1]: Child html-webpack-plugin for "index.html":
2019-09-13T02:12:17.535576+00:00 app[web.1]: 1 asset
2019-09-13T02:12:17.535579+00:00 app[web.1]: Entrypoint undefined = ./index.html
2019-09-13T02:12:17.535581+00:00 app[web.1]: [./node_modules/html-webpack-plugin/lib/loader.js!./src/index.html] 6.57 KiB {0} [built]
2019-09-13T02:12:17.535583+00:00 app[web.1]: [./node_modules/lodash/lodash.js] 528 KiB {0} [built]
2019-09-13T02:12:17.535585+00:00 app[web.1]: [./node_modules/webpack/buildin/global.js] (webpack)/buildin/global.js 472 bytes {0} [built]
2019-09-13T02:12:17.535587+00:00 app[web.1]: [./node_modules/webpack/buildin/module.js] (webpack)/buildin/module.js 497 bytes {0} [built]
2019-09-13T02:12:17.535687+00:00 app[web.1]: ℹ ｢wdm｣: Compiled successfully.
2019-09-13T02:12:51.301903+00:00 heroku[web.1]: State changed from starting to crashed
2019-09-13T02:12:51.201734+00:00 heroku[web.1]: Error R10 (Boot timeout) -> Web process failed to bind to $PORT within 60 seconds of launch2019-09-13T02:12:51.201792+00:00 heroku[web.1]: Stopping process with SIGKILL
2019-09-13T02:12:51.284740+00:00 heroku[web.1]: Process exited with status 137
2019-09-13T02:12:52.535564+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=bus-ar.herokuapp.com request_id=14d31193-7da1-4d2e-8811-4bf5f6799da2 fwd="202.57.49.249" dyno= connect= service= status=503 bytes= protocol=https
2019-09-13T02:12:52.999604+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=bus-ar.herokuapp.com request_id=b6b0a4d9-fe21-4c85-ae85-95d7ed9c6a20 fwd="202.57.49.249" dyno= connect= service= status=503 bytes= protocol=https
2019-09-13T02:12:53.467066+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=bus-ar.herokuapp.com request_id=45e786ac-122e-4464-9f9c-6ed201c3d85f fwd="202.57.49.249" dyno= connect= service= status=503 bytes= protocol=https
我可以在本地构建它，但是我需要它在Heroku中运行才能成为讲师的视线。如何通过启动超时解决此问题？