How to get Heroku to recognize a yarn.lock or package.json within a subdirectory (not root)

Question

I have a Rails application using React, Webpack, and Yarn for the client side. I have everything relating to the client side within the /client directory. This includes my yarn.

Answer 1

maybe your can try typing in package.json

  "engines": {
    "node": "^6.9",
    "yarn": "^0.21"
  },