runcon: add page

[tonytheleg]

Per issue #2213, adding runcon

• The page (if new), does not already exist in the repo.
• The page is in the correct platform directory (common/, linux/, etc.)
• The page has 8 or fewer examples.
• The PR title conforms to the recommended templates.
• The page follows the content guidelines.
• The page description includes a link to documentation or a homepage (if applicable).

[CLAassistant]

All committers have signed the CLA.

[tldr-bot]

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

Error: Parse error on line 12:
...TYPE_t {{{command}}` `- Specify the ro
-----------------------^
Expecting 'NEWLINE', 'TEXT', 'DASH', 'BACKTICK', got 'COMMAND_TEXT'
pages/linux/runcon.md:11: TLDR103 Command example is missing its closing backtick

Please fix the error(s) and push again.

[tldr-bot]

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

Error: Parse error on line 12:
...TYPE_t {{{command}}` `- Specify the ro
-----------------------^
Expecting 'NEWLINE', 'TEXT', 'DASH', 'BACKTICK', got 'COMMAND_TEXT'
pages/linux/runcon.md:11: TLDR103 Command example is missing its closing backtick

Please fix the error(s) and push again.

[owenvoke]

LGTM 👍

[sbrl]

Thanks for the new page, @tonytheleg ! I've left some comments below for you to review.

[sbrl]

Thanks, @tonytheleg!

Comment addressed.

[mebeim]

I've fixed the page since it has been sitting here for a while. I've also dismissed @agnivade's review since I've addressed his comment, but he's unfortunately currently locked out of his GitHub account. It looks good to merge to me, what do you guys think?

[mebeim]

Merging since this already has 4 approvals (+ 1 from @agnivade via Gitter).

[andrik]

Nice one guys, this PR closes #2213

[mebeim]

Woah really? Didn't notice, nice! 🚀