Serverless Node Pro Tips

Do't use callbacks:

module.exports.handler = async (event, context, cb ) => {
const response = {
statusCode: 200,
body: JSON.stringify({message: 'helloWord'})
}

cb(null,response)
}

could be written as:

module.exports.handler = async (event, context, cb ) => {
const response = {
statusCode: 200,
body: JSON.stringify({message: 'helloWord'})
}

return response
}