add document to collevtion code example
Example 1: mongodb insert
db.products.insert( { item: "card", qty: 15 } )
Example 2: insert command mongo
db.collection.insert( { item: "card", qty: 15 } )
db.products.insert( { item: "card", qty: 15 } )
db.collection.insert( { item: "card", qty: 15 } )