title: How to solve vue-cli-service: not found proplem on heroku?
body: <p>I have problem trying to deply my app named tr3 (, which is working good on localhost, and I also  learned to deploy "test app" using heroku, everything was fine).
  But now, when I have used command</p>
  
  <p>git push heroku master</p>
  
  <p>There is a message</p>
  
  <pre><code>remote: -----&gt; Compressing...
  remote:        Done: 22.2M
  remote: -----&gt; Launching...
  remote:        Released v8
  remote:        https://stark-oasis-45806.herokuapp.com/ deployed to Heroku
  remote: 
  remote: Verifying deploy... done.
  To https://git.heroku.com/stark-oasis-45806.git
     12055ef..fbc5e05  master -&gt; master
  </code></pre>
  
  <p>But link <a href="https://stark-oasis-45806.herokuapp.com/" rel="noreferrer">https://stark-oasis-45806.herokuapp.com/</a> leads to an error</p>
  
  <pre><code>020-06-19T17:42:19.575287+00:00 app[web.1]: &gt; tr3@0.1.0 start /app
  2020-06-19T17:42:19.575288+00:00 app[web.1]: &gt; npm run  serve
  2020-06-19T17:42:19.575288+00:00 app[web.1]: 
  2020-06-19T17:42:20.037740+00:00 app[web.1]: 
  2020-06-19T17:42:20.037766+00:00 app[web.1]: &gt; tr3@0.1.0 serve /app
  2020-06-19T17:42:20.037767+00:00 app[web.1]: &gt; vue-cli-service serve
  2020-06-19T17:42:20.037767+00:00 app[web.1]: 
  2020-06-19T17:42:20.045068+00:00 app[web.1]: sh: 1: vue-cli-service: not found
  2020-06-19T17:42:20.049281+00:00 app[web.1]: npm ERR! code ELIFECYCLE
  2020-06-19T17:42:20.049568+00:00 app[web.1]: npm ERR! syscall spawn
  2020-06-19T17:42:20.049812+00:00 app[web.1]: npm ERR! file sh
  </code></pre>
  
  <p>Also here is my package.json</p>
  
  <pre><code>{
    "engines": {
      "node": "10.x"
    },
    "name": "tr3",
    "version": "0.1.0",
    "private": true,
    "scripts": {
      "serve": "vue-cli-service serve",
      "build": "vue-cli-service build",
      "lint": "vue-cli-service lint",
      "start": "npm run  serve",
      "heroku-postinstall": "npm install &amp;&amp; npm run build"
    },
    "heroku-postinstall": "npm install &amp;&amp; npm run build",
    "dependencies": {
      "core-js": "^3.6.5",
      "vue": "^2.6.11",
      "vue-router": "^3.3.4",
       "vuex": "^3.4.0"
    },
    "devDependencies": {
      "@vue/cli-plugin-babel": "~4.4.0",
      "@vue/cli-plugin-eslint": "~4.4.0",
      "@vue/cli-service": "~4.4.0",
      "babel-eslint": "^10.1.0",
      "eslint": "^6.7.2",
      "eslint-plugin-vue": "^6.2.2",
      "vue-template-compiler": "^2.6.11"
    },
    "eslintConfig": {
      "root": true,
      "env": {
        "node": true
      },
      "extends": [
        "plugin:vue/essential",
        "eslint:recommended"
      ],
      "parserOptions": {
        "parser": "babel-eslint"
      },
      "rules": {}
    },
    "browserslist": [
      "&gt; 1%",
      "last 2 versions",
      "not dead"
    ]
  }
  </code></pre>