无法在 heroku 上打开应用程序。 反应，node.js

Question

so I've tjried several solutions I found here and unfortunately none of them seemed to work. I have an app which I have deployed on heroku. Frontend in react.js backend in node. When I run

 heroku open

I receive an error 404 in console. Heroku logs show error code 503 and "Failed at the @ start script". I am not sure what might be a problem, here is my json

 { "dependencies": { "axios": "^0.19.2", "bootstrap": "^4.5.0", "cors": "^2.8.5", "express": "4.17.1", "node-sass": "^4.14.1", "react": "^16.13.1", "react-dom": "^16.13.1", "react-redux": "^7.2.0", "react-router-dom": "^5.2.0", "react-scripts": "^3.4.1", "reactstrap": "^8.5.1", "redux": "^4.0.5", "redux-thunk": "^2.3.0", "uuidv4": "^6.1.1" }, "scripts": { "start": "node server.js", "server": "nodemon server.js", "client": "npm run start --prefix client", "dev": "concurrently \"npm run server\" \"npm run client\"", "heroku-postbuild": "NPM_PRODUCTION=false npm install --prefix client && npm run build --prefix client", }, "build": "cd client && yarn install && yarn build" }

Please advise.

Answer 1

Ok, so the issue is fixed now. The problem was version or react-scripts in packaje.json. It differed in client and server side. Once I made sure the version it the same I rebuild the app and it opened correctly. Hope that helps someone in the future.