Helpful Articles/ Docs:

• insertOne(): https://docs.mongodb.com/manual/reference/method/db.collection.insertOne/

• insertMany(): https://docs.mongodb.com/manual/reference/method/db.collection.insertMany/

• Atomicity: https://docs.mongodb.com/manual/core/write-operations-atomicity/#atomicity

• Write Concern: https://docs.mongodb.com/manual/reference/write-concern/

• Using mongoimport: https://docs.mongodb.com/manual/reference/program/mongoimport/index.html