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

pages/common/mongod.md

@@ -3,14 +3,18 @@
 > The MongoDB database server.
 > More information: <https://docs.mongodb.com/manual/reference/program/mongod>.
 
+- Specify the storage directory (default: `/data/db` on Linux and MacOS, `C:\data\db` on Windows):
+
+`mongod --dbpath {{path/to/directory}}`
+
 - Specify a config file:
 
 `mongod --config {{path/to/file}}`
 
-- Specify the port to listen on:
+- Specify the port to listen on (default: 27017):
 
 `mongod --port {{port}}`
 
-- Specify database profiling level. 0 is off, 1 is only slow operations, 2 is all:
+- Specify the database profiling level. 0 is off, 1 is only slow operations, 2 is all (default: 0):
 
 `mongod --profile {{0|1|2}}`