importing

https://github.com/christophrumpel/laravel-import-million-rows
https://github.com/spatie/simple-excel
https://csv.thephpleague.com/

MONGODB
model schema
https://www.mongodb.com/docs/drivers/php/laravel-mongodb/v4.x/eloquent-models/schema-builder/

upsert
https://medium.com/@kaamil.mirza.2002/how-i-learned-to-upsert-millions-of-documents-into-mongodb-with-minimal-overhead-8b7f9404a70c
https://www.mongodb.com/docs/manual/reference/method/Bulk.find.upsert/

https://www.mongodb.com/docs/drivers/php/laravel-mongodb/current/fundamentals/write-operations/

CHART
https://icehouse-ventures.github.io/laravel-chartjs/
https://www.chartjs.org/docs/latest/configuration/interactions.html