Sites hosted in subfolders

[peakwinter]

e.g. http://mywebsite.com/blog

In short:

• Instead of creating one nginx server block for every site, a base nginx server block is created for each domain. This will also facilitate automatic Let's Encrypt validation
• When a new site is created, the base block for the domain is added. Everything required in the server block goes into a Location block for the subfolder
• The desired subfolder path is passed to the website on pre_install, as the subdomain path is required to customize addtoblock items that the website already requires
• nginx server blocks then go from being named like /etc/nginx/sites-available/mysite to /etc/nginx/sites-available/mysite.com:80