terminal commands to setup eslint (https://medium.com/@UnicornAgency/jamstack-pwa-lets-build-a-polling-app-with-gatsby-js-firebase-and-styled-components-pt-1-78a03a633092)

install-airbnb-eslint

export PKG=eslint-config-airbnb;
  npm info "$PKG@latest" peerDependencies --json | command sed 's/[\{\},]//g ; s/: /@/g' | xargs npm install --save-dev "$PKG@latest"
  
  #Install other ESLint peer-dependancies as well as prettier:
  npm install -D babel-eslint eslint-config-react eslint-config-prettier eslint-plugin-prettier prettier