title: I have an nodejs app, is this post a hacker attack?
body: <p>I have a node js app behind a nginx proxy server.
  I have seen some calls as:</p>
  <pre><code>[30/Aug/2020:05:42:11 GMT-0300] &quot;POST /api/jsonws/invoke&quot; 404 136 - 2.591 ms
  </code></pre>
  <p>What is this? Is it a hacker attack?</p>