mongod: add page

[YangVincent]

Fixes #1176

---

• The page (if new), does not already exist in the repo.

• The page (if new), has been added to the correct platform folder:
  common/ if it's common to all platforms, linux/ if it's Linux-specific, and so on.

• The page has 8 or fewer examples.

• The PR is appropriately titled:
  <command name>: add page for new pages, or <command name>: <description of changes> for pages being edited

• The page follows the contributing guidelines

[YangVincent]

#1176

[agnivade]

Thanks for the page, I have left some comments.

[agnivade]

I suggest changing this line to "The MongoDB database server"

[agnivade]

runtime configurations => a config file

[agnivade]

<filename> => {{filename}}

[agnivade]

Specify the port to listen on.

[agnivade]

<port> => {{port}}

[agnivade]

Change => Specify. And wrap the last sentence in parenthesis.

[agnivade]

=> {{0|1|2}}

[tldr-bot]

The build for this PR has failed with the following error(s):

pages/common/mongod.md:3: TLDR004 Command descriptions should end in a period

Please fix the error(s) and push again.

[sbrl]

Looks ok to me! Looks like you've created all sorts of pages recently, @YangVincent - thanks 😺

If you're interested in sticking around, perhaps we could grant you member privileges? Can't remember what the procedure is there. @waldyrious / @agnivade?

[YangVincent]

Sure, I'd love that! I use tldr pretty often so it's nice to be able to contribute to the project

[agnivade]

I think we should let @YangVincent hang around for a little more time to get a feel for the overall theme for this project, before granting him higher privileges.

[sbrl]

Good idea, @agnivade