mongo*: update pages & add mongosh (#10558)

pages/common/mongosh.md

@@ -0,0 +1,21 @@
+# mongosh
+
+> A new shell for MongoDB, replacement for `mongo`.
+> Note: all connection options can be replaced with one string: `mongodb://user@host:port/db_name?authSource=authdb_name`.
+> More information: <https://www.mongodb.com/docs/mongodb-shell>.
+
+- Connect to a local database on the default port (`mongodb://localhost:27017`):
+
+`mongosh`
+
+- Connect to a database:
+
+`mongosh --host {{host}} --port {{port}} {{db_name}}`
+
+- Authenticate using the specified username on the specified database (you will be prompted for a password):
+
+`mongosh --host {{host}} --port {{port}} --username {{username}} --authenticationDatabase {{authdb_name}} {{db_name}}`
+
+- Evaluate a JavaScript expression on a database:
+
+`mongosh --eval '{{JSON.stringify(db.foo.findOne())}}' {{db_name}}`