handler.js

const path = require('path')

require(path.resolve('models/Schedule'))
const Location = require(path.resolve('models/Location'))

const connectToDatabase = require(path.resolve('src/helpers/connectToDb'))

module.exports.handler = async () => {
  try {
    await connectToDatabase()

    const locations = await Location.find().populate('schedule')

    return {
      statusCode: 200,
      headers: { 'Access-Control-Allow-Origin': '*' },
      body: JSON.stringify({
        locations
      })
    }
  } catch (error) {

    return {
      statusCode: 500,
      headers: { 'Access-Control-Allow-Origin': '*' },
      body: JSON.stringify({
        message: 'Error, please try again later'
      })
    }
  }
}