title: Docker - How to run a package installed during the build?
body: <p>I am trying to replicate something I do from the CLI in a docker image.
  I install an npm package globally and just try to run it.</p>
  
  <p><code>npm</code> is successfully installed, but the CMD fails with <code>mup: command not found</code></p>
  
  <pre><code>FROM ubuntu:latest
  
  #...
  
  # Install mup
  RUN npm install mup -g
  
  CMD ["/bin/bash", "-c", "mup ${*}"]
  </code></pre>