Best practices: add new ideas and links

[tripu]

“Best practices and recommended tools”:

• For all users: add new sections “own your code” and “submit atomic PR's”.
• For repo maintainers: add advice about enforcing code reviews on certain branches, the CODEOWNERS file, and the need to have LICENSE.md in the root directory.
• Add reference to w3c/nodejs at the bottom.
• Fix markup.

Also, add a CODEOWNERS file (eating our own dog food), and I have already changed the settings on this repo to start using it.

[vivienlacourba]

Those additions look good.

[plehegar]

This PR workflow isn't integrated with
https://w3c.github.io/workflow.html
or
https://w3c.github.io/specs.html

So, it's becoming confusing which pages to look. Let's not end up where the /Guide is, ie just a repository of various docs without interlinks.

By integrating, I don't mean that your doc needs to be merged with the existing ones, but the TOC should be clearer how they relate.

[tripu]

Good point, @plehegar. We should try to better direct users to the appropriate page from the TOC, now that the documentation has finer granularity. Also, make sure we don't repeat ourselves, and link between pages when that makes sense. (Am I interpreting your comment right?)

I'll bear that in mind in future PRs.

[plehegar]

yep, you got my comment right.