Add a "www" version in "HTTP Redirect" server block

[rafaelfess]

The "HTTP Redirect" block is missing a "www.example.com" version of the domain. I've encountered problems on redirecting without it.

server_name .{{ domain() }};<!--

It could be something like this: (but is needed to verify if the "www" is checked)

server_name .{{ domain() }} www.{{ domain() }};<!--

File: public/templates/conf/sites-available/example.com.conf.html
Line: 200

[0xb4lint]

According to NGINX docs: http://nginx.org/en/docs/http/server_names.html
Wildcard names
A special wildcard name in the form “.example.org” can be used to match both the exact name “example.org” and the wildcard name “*.example.org”.