start creation of nginx role

* install the package
* enable the service
* make sure it's running
* copy verbatim nginx configs that come with distribution
  * nginx.conf -> templates (we probably are going to template it
    somehow)
  * rest -> files (these will be used verbatim)
* install the configuration files and render the template
* add a handler to reload nginx in case its configurations files are
  changed
wip