Can we please add the supported node version(s) somewhere?

[sdennett55]

Spent a decent chunk of time following a generic error trail when cloning the repo and attempting to install and run locally. Turns out the node version of 12 and another version of 8 I had installed are incompatible. Through trial and error, I found that v10.20.1 worked without a hitch. Can we add something like this to the package.json to at least provide a warning/hint to the user?

"engines": {
    "node": "=10.20.1",
    "npm": ">=6.0.0"
  },

If not, maybe just a note in the README? My npm version is 6.14.4 in case that helps anyone.