Update docs dependencies + extras

[adRn-s]

Extras:

1. I've bumped into a problem while installing, because I copied the commands straight away. This wouldn't happen anymore.
2. And I removed a changelog comment that gave no extra information, and it was being mentioned as the first thing in the 'how to config' section. We could reformat accordingly the last sentences in these sections, where the info seemed to be repeated anyway.