title: npm concurrently error? when running both frontend and backend together?
body: <pre><code>&quot;scripts&quot;: {
      &quot;test&quot;: &quot;echo \&quot;Error: no test specified\&quot; &amp;&amp; exit 1&quot;,
      &quot;server&quot;: &quot;nodemon backend/server.js&quot;,
      &quot;client&quot;: &quot;npm start --prefix frontend&quot;,
      &quot;dev&quot;: &quot;concurrently \&quot;npm run server\&quot; \&quot;npm run client\&quot;&quot;
    }
  </code></pre>
  <p>here's my scripts for the package.json file that's outside the frontend and backend folders (in the root folder). and when I run the command <code>npm run dev</code> it doesn't work for some reason. note that <code>npm run server</code> and <code>npm run client</code> work prefectly but the issue is when I run the command <code>npm run dev</code> which has the <code>concurrently</code> in it, I don't know what's the issue, is there something I can do to fix this? here's the error message that I get:</p>
  <pre><code>npm ERR! code ELIFECYCLE
  npm ERR! errno 1
  npm ERR! ecommerce_shop@1.0.0 dev: `concurrently &quot;npm run server&quot; &quot;npm run client&quot;`
  npm ERR! Exit status 1
  npm ERR! 
  npm ERR! Failed at the ecommerce_shop@1.0.0 dev 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!     /home/user/.npm/_logs/2021-01-29T18_24_43_756Z-debug.log
  
  </code></pre>