Specify required node version in readme, package.json or nvmrc file

Problem/Motivation

Project should indicate which version(s) of node are supported for each release.

Steps to reproduce

Attempt to run npm install with the incorrect version. Errors will be displayed in terminal, until user upgrades/downgrades to correct node version.

Proposed resolution

There are multiple options for indicating which version(s) of node should be used for a release (even if we're not enforcing it programmatically):

• Add a line to the README documentation: "For version 5.0.2, please install and use node <= v10.23.3"
• Use the package.json "engines" field to specify the version:
  https://docs.npmjs.com/cli/v7/configuring-npm/package-json#engines

  {
    "engines": {
      "node": ">=0.10.3 <15"
    }
  }
  

• Add a nvmrc file to the project (for those using node version manager):
  https://github.com/nvm-sh/nvm#nvmrc

Remaining tasks

Choose one of the options above, and update the codebase.

User interface changes

No UI changes required.

API changes

No API changes.

Data model changes

No Data model changes.

Thank you very much for creating this starter kit!!