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My app is working fine when hosted locally, but when I try to deploy the build fails with the following output log:

-----> Node.js app detected



-----> Creating runtime environment



       NPM_CONFIG_LOGLEVEL=error

       NODE_ENV=production

       NODE_MODULES_CACHE=true

       NODE_VERBOSE=false



-----> Installing binaries

       engines.node (package.json):  8.10.0

       engines.npm (package.json):   6.4.1



       Resolving node version 8.10.0...

       Downloading and installing node 8.10.0...

       Bootstrapping npm 6.4.1 (replacing 5.6.0)...

       npm 6.4.1 installed



-----> Restoring cache

       Cached directories were not restored due to a change in version of node, npm, yarn or stack

       Module installation may take longer for this build



-----> Building dependencies

       Installing node modules (package.json + package-lock)

       npm ERR! code EINVALIDTYPE

       npm ERR! typeerror Error: Argument #5: Expected object but got string

       npm ERR! typeerror     at inflatableChild (/tmp/build_8521c67f1a08023343c4f34aedc664fb/.heroku/node/lib/node_modules/npm/lib/install/inflate-shrinkwrap.js:93:3)

       npm ERR! typeerror     at BB.each (/tmp/build_8521c67f1a08023343c4f34aedc664fb/.heroku/node/lib/node_modules/npm/lib/install/inflate-shrinkwrap.js:55:12)

       npm ERR! typeerror     at tryCatcher (/tmp/build_8521c67f1a08023343c4f34aedc664fb/.heroku/node/lib/node_modules/npm/node_modules/bluebird/js/release/util.js:16:23)

       npm ERR! typeerror     at Object.gotValue (/tmp/build_8521c67f1a08023343c4f34aedc664fb/.heroku/node/lib/node_modules/npm/node_modules/bluebird/js/release/reduce.js:155:18)

       npm ERR! typeerror     at Object.gotAccum (/tmp/build_8521c67f1a08023343c4f34aedc664fb/.heroku/node/lib/node_modules/npm/node_modules/bluebird/js/release/reduce.js:144:25)

       npm ERR! typeerror     at Object.tryCatcher (/tmp/build_8521c67f1a08023343c4f34aedc664fb/.heroku/node/lib/node_modules/npm/node_modules/bluebird/js/release/util.js:16:23)

       npm ERR! typeerror     at Promise._settlePromiseFromHandler (/tmp/build_8521c67f1a08023343c4f34aedc664fb/.heroku/node/lib/node_modules/npm/node_modules/bluebird/js/release/promise.js:512:31)

       npm ERR! typeerror     at Promise._settlePromise (/tmp/build_8521c67f1a08023343c4f34aedc664fb/.heroku/node/lib/node_modules/npm/node_modules/bluebird/js/release/promise.js:569:18)

       npm ERR! typeerror     at Promise._settlePromise0 (/tmp/build_8521c67f1a08023343c4f34aedc664fb/.heroku/node/lib/node_modules/npm/node_modules/bluebird/js/release/promise.js:614:10)

       npm ERR! typeerror     at Promise._settlePromises (/tmp/build_8521c67f1a08023343c4f34aedc664fb/.heroku/node/lib/node_modules/npm/node_modules/bluebird/js/release/promise.js:693:18)

       npm ERR! typeerror     at Async._drainQueue (/tmp/build_8521c67f1a08023343c4f34aedc664fb/.heroku/node/lib/node_modules/npm/node_modules/bluebird/js/release/async.js:133:16)

       npm ERR! typeerror     at Async._drainQueues (/tmp/build_8521c67f1a08023343c4f34aedc664fb/.heroku/node/lib/node_modules/npm/node_modules/bluebird/js/release/async.js:143:10)

       npm ERR! typeerror     at Immediate.Async.drainQueues (/tmp/build_8521c67f1a08023343c4f34aedc664fb/.heroku/node/lib/node_modules/npm/node_modules/bluebird/js/release/async.js:17:14)

       npm ERR! typeerror     at runCallback (timers.js:794:20)

       npm ERR! typeerror     at tryOnImmediate (timers.js:752:5)

       npm ERR! typeerror     at processImmediate [as _immediateCallback] (timers.js:729:5)

       npm ERR! typeerror This is an error with npm itself. Please report this error at:

       npm ERR! typeerror     <https://npm.community>



       npm ERR! A complete log of this run can be found in:

       npm ERR!     /tmp/npmcache.Mus2Z/_logs/2018-11-18T01_38_26_671Z-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



       If you're stuck, please submit a ticket so we can help:

       https://help.heroku.com/



       Love,

       Heroku



 !     Push rejected, failed to compile Node.js app.

 !     Push failed

Here is my package.json file:

{

  "name": "scheduling",

  "version": "1.0.0",

  "description": "",

  "main": "server.js",

  "scripts": {

    "test": "echo "Error: no test specified" && exit 1",

    "start": "node server.js",

    "postinstall": "ng build --aot --target=production"

  },

  "engines": {

    "node": "8.10.0",

    "npm" : "6.4.1"

  },

  "repository": {

    "type": "git",

    "url": "https://github.com/ActionPackedJack/Restaurant-Schedule"

  },

  "keywords": ,

  "author": "",

  "license": "ISC",

  "dependencies": {

    "@angular/cli": ">=1.0.3",

    "@angular/compiler-cli": ">=4.0.0",

    "express": "^4.16.3",

    "jquery": "^3.3.1",

    "mongoose": "^5.2.2",

    "rxjs": "^6.2.1",

    "rxjs-compat": "^6.2.1",

    "typescript": ">=2.2.0"

  }

}

And here is my server.js:

var express = require('express');

var app = express();

var bodyParser = require('body-parser');

app.set('port', (process.env.PORT || 5000));

app.use(bodyParser.json());

app.use(bodyParser.urlencoded({extended : true}))

var path = require('path');

app.use(express.static(path.join(__dirname, './public/dist/public/')));

app.get('/*', function(req,res){

    res.sendFile(path.join(__dirname, '/public/dist'));

})

//app.set('views', path.join(__dirname, '/public/dist'))

require('./server/config/mongoose.js');

var routes_setter = require('./server/config/routes.js');

routes_setter(app);

app.listen(app.get('port'), function(){

    console.log('Node app is running on port', app.get('port'))

});

I read another instance of a user solving this problem by deleting their package-lock.json file, but trying that resulted in a different error, "The build command requires to be run in an Angular project, but a project definition could not be found."

Any thoughts would be greatly appreciated, please and thank you!

Your package.json doesn't have devDependencies, are they needed?

I followed this link:
https://medium.com/@hellotunmbi/how-to-deploy-angular-application-to-heroku-1d56e09c5147
but pay attention to his updated link for updates:
https://medium.com/@shubhsharma10/how-to-deploy-angular-6-app-to-heroku-52b73ac7a3aa

My package.json file in my heroku app looks like:

{

"name": "my-app",

"version": "0.0.0",

"scripts": {

"ng": "ng",

"start": "node server.js",

"build": "ng build",

"test": "ng test",

"lint": "ng lint",

"e2e": "ng e2e",

"postinstall": "ng build --aot --prod"

},

"private": true,

"dependencies": {

"@angular/animations": "~7.0.0",

"@angular/common": "~7.0.0",

"@angular/compiler": "~7.0.0",

"@angular/compiler-cli": "^7.0.3",

"@angular/core": "~7.0.0",

"@angular/forms": "~7.0.0",

"@angular/http": "~7.0.0",

"@angular/platform-browser": "~7.0.0",

"@angular/platform-browser-dynamic": "~7.0.0",

"@angular/router": "~7.0.0",

"angular-font-awesome": "^3.1.2",

"bootstrap": "^4.1.3",

"core-js": "^2.5.4",

"curl": "^0.1.4",

"express": "^4.16.4",

"font-awesome": "^4.7.0",

"jquery": "^3.3.1",

"latest": "^0.2.0",

"path": "^0.12.7",

"popper.js": "^1.12.9",

"rxjs": "^6.3.3",

"typescript": "~3.1.1",

"zone.js": "~0.8.26"

},

"devDependencies": {

"@angular-devkit/build-angular": "~0.10.0",

"@angular/cli": "^7.0.5",

"@angular/compiler-cli": "^7.0.3",

"@angular/language-service": "~7.0.0",

"@types/jasmine": "~2.8.8",

"@types/jasminewd2": "~2.0.3",

"@types/node": "~8.9.4",

"codelyzer": "~4.5.0",

"enhanced-resolve": "^4.1.0",

"jasmine-core": "~2.99.1",

"jasmine-spec-reporter": "~4.2.1",

"karma": "~3.0.0",

"karma-chrome-launcher": "~2.2.0",

"karma-coverage-istanbul-reporter": "~2.0.1",

"karma-jasmine": "~1.1.2",

"karma-jasmine-html-reporter": "^0.2.2",

"protractor": "~5.4.0",

"ts-node": "~7.0.0",

"tslint": "~5.11.0",

"typescript": "~3.1.1"

 },

 "engines": {

"node": "10.12.0",

"npm": "6.4.1"

}

}