title: Matching nvmrc node version to Docker node base image
body: <p>I'm trying to streamline the development + build process for an older project where there's not been much management of the node version. For building the docker image which is used for both tests and deployment, I'd like to be able to pull the node version defined in <code>.nvmrc</code> file and pull the node base docker image using that.</p>
  
  <p>Is there already a docker base image which achieves something like this, or is it a case of just writing it myself?</p>