title: How do I run startup scripts for DOCKER when deployed via Cloud Compute Engine instances?
body: <p>I'm creating an instance template under GCP's Cloud Engine section.</p>
  
  <p>Usually when deploying a docker image, there's a docker file that includes some startup scripts after specifying the base image to pull and build, but I can't see where I can either submit a docker file, or enter startup scripts.</p>
  
  <p>I can see a field for startup scripts for the Cloud Compute instance, but that's different from the scripts passed on for the Docker's startup.</p>
  
  <p>Are these perhaps to be filled in under "Command", "Command arguments", or "Environment Variables"?</p>
  
  <p><a href="https://i.stack.imgur.com/ogANu.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ogANu.png" alt="Screenshot of the GUI I&#39;m seeing"></a></p>
  
  <p>For clarification, this is someone else's image of a dockerfile I pulled from Google Images. The part I wish to add is "rectangled" in red, the RUN commands, but not these exact commands.</p>
  
  <p>In my case, I would like to add something like </p>
  
  <p><code>RUN python /pythonscript.py</code></p>
  
  <p><a href="https://i.stack.imgur.com/KeuvV.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/KeuvV.png" alt="RUN commands"></a></p>