error while pushing node js project to heroku - node.js

Question

I am getting this error while I am trying to push my project to heroku. Backend is writtend in nodeJS, frontend in React. I think the problem is heroku-postbuild, because if I remove it, push works. I was searching for it but still I have no idea what is the reason. Can somebody help me?
/tmp/build_7504975f08f330415cdefb27437cfad9/node_modules/.bin/node: 1: /tmp/build_7504975f08f330415cdefb27437cfad9/node_modules/.bin/node: MZ����#: not found
/tmp/build_7504975f08f330415cdefb27437cfad9/node_modules/.bin/node: 1: /tmp/build_7504975f08f330415cdefb27437cfad9/node_modules/.bin/node: Syntax error: word unexpected (expecting ")")
npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! project#1.0.0 heroku-postbuild: `cd client && npm install && npm run build`
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the project#1.0.0 heroku-postbuild script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! /tmp/npmcache.W89m8/_logs/2018-11-13T21_37_22_676Z-debug.log
-----> Build failed
We're sorry this build is failing! You can troubleshoot common issues here:
https://devcenter.heroku.com/articles/troubleshooting-node-deploys
Some possible problems:
- node_modules checked into source control
https://blog.heroku.com/node-habits-2016#9-only-git-the-important-bits
- Node version not specified in package.json
https://devcenter.heroku.com/articles/nodejs-support#specifying-a-node-js-version
Love,
Heroku
! Push rejected, failed to compile Node.js app.
! Push failed
package.json (server)
{
"name": "project",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"start": "node server.js",
"server": "nodemon server.js",
"client-install": "npm install --prefix client",
"client": "npm start --prefix client",
"dev": "concurrently \"npm run server\" \"npm run client\"",
"heroku-postbuild": "cd client && npm install && npm run build"
},
"author": "",
"license": "ISC",
"dependencies": {
"concurrently": "^4.0.1",
"express": "^4.16.4",
"jsonwebtoken": "^8.3.0",
"mongoose": "^5.3.4",
"node": "^8.10.0",
"nodemon": "^1.18.4",
"passport": "^0.4.0",
"passport-jwt": "^4.0.0",
"react-scripts": "1.0.11",
},
"devDependencies": {
"nodemon": "^1.18.4",
"react-scripts": "1.0.11"
}
}
package.json (client)
{
"name": "client",
"version": "0.1.0",
"private": true,
"dependencies": {
"parallelshell": "^3.0.2",
"react-dom": "^16.5.2",
"react-redux": "^5.0.7",
"react-router": "^4.3.1",
"react-router-dom": "^4.3.1",
"react-router-redux": "^4.0.8",
"react-scripts": "2.0.5",
"socket.io-client": "^1.7.3",
},
"scripts": {
"start": "parallelshell \"react-scripts start\" \"sass --watch src/styles/scss:src/styles/css --style compressed\"",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject",
"sass": "sass --watch src/styles/scss:src/styles/css --style compressed",
"sass-nw": "sass src/styles/scss:src/styles/css"
},
"proxy": "http://localhost:5000/",
}

Answer 1

I ran into the similar error while troubleshooting a project. I resolved it by using the suggestions from the prompt.
Some possible problems:
- node_modules checked into source control
https://blog.heroku.com/node-habits-2016#9-only-git-the-important-bits
- Node version not specified in package.json
https://devcenter.heroku.com/articles/nodejs-support#specifying-a-node-js-version
So try do a "rm -rf node_modules" in the root directory if you checked node_modules into the repository. Heroku will install node_modules in the deployed environment and does not need your checked in version.