Create GeoJson from Firestore Database in Google Firebase

code.js

// Install geojson from npm --> npm I -S geojson
import GeoJSON from 'geojson'

// Import your initalized Firebase/Firestore 
// I have bundled it into a module
import { db } from '@/services/firebase'

// Query
db.collection('your_firestore_collection_id')
                .get()
                .then(querySnapshot => {
           
                    const myGeoJson = GeoJSON.parse(querySnapshot.docs.map(doc => doc.data()), { Point: ['lng', 'lat'] })
                   
                    // no do anything with that JSON
                    console.log('print:  ', myGeoJson)
                })