title: Google App Engine Standard Node JS how to run build script?
body: <p>Does GAE standard for Node support a way to have build scripts? I tried using postinstall within package.json but that did not work.</p>
  
  <p>My codebase has subdirectories with <code>package.json</code> within the subdirectories. In my root <code>package.json</code> there is </p>
  
  <pre><code>scripts: { 
      postinstall: cd vendor &amp;&amp; npm install 
      ....
  }
  </code></pre>
  
  <p>However I'm not seeing any vendor packages installed so I'm inclined to believe the postinstall does not get triggered on GAE Node standard.</p>
  
  <p>Is there any way for me to install subdirectory dependencies without having to copy and paste all my <code>vendor/package.json</code> dependencies to the root? </p>
  
  <p>Note: I've also tried putting an "install" within the package.json scripts but that didn't seem to get triggered either.</p>