Original question

change both SendGrid API Key and sender email in the code

const SENDGRID_API_KEY = 'SENDGRID_API_KEY'
const SENDGRID_SENDER_EMAIL = 'SENDGRID_SENDER_EMAIL'

install and start server with

npm i
npm start

if using VSCode REST Client plugin, open _.http and run the request

using nvm, install 14.16.0

nvm install 14.16.0
nvm use 14.16.0

.nvmrc exists, so all you need is to have an NVM extension in VSCode to load the correct version when you open the project