copy the .env.template to .env

Create a firebase project

In Sign-in method Enable Google

Create a Web project so you have all the values in .env.template (except REACT_APP_CLIENT_ID which you get cloud.google.com)

goto cloud.google.com find your firebase project

Goto Credientials and create a OAuth 2.0 Client IDs

Add http://localhost:3000 Authorized redirect URIs

Get the Client ID from the Crediential and add it to REACT_APP_CLIENT_ID in .env

Goto Google APIs and enable Calendar https://console.cloud.google.com/apis/library/sheets.googleapis.com?id=739c20c5-5641-41e8-a938-e55ddc082ad1&project=webidesa-1569217854481

run npm install

run npm start