Watch out for indentation in docs

[dosena]

In your docs, check out the example under

4. Install Nginx and add 2 sites (different method)

-> the indentation around nginx_sites is messed up

New-to-ansible users will get confused as the nginx_sites ... $url bit actually lands in the nginx conf file (especially if the users are also of the copy-and-pasting and/or lazy-or-unwary or just-plain-tired sorts)