Custom branding on dashboard

Hi all, I’m new to Ghost and been dealing with a customer that would like to have its own branding in Ghost’s dashboard.

More specifically, he’d like to change the logo in the dashboard to his publication and also edit the url for the links in the menu that bring you to the Ghost documentation (eg. What’s new, support center…)
Is this possible?

Also, since I’m using Ghost as headless cms, is it possible to remove the “View site” link in the dashboard?