(For Debian/Ubuntu only) Allows you to set a different repository for the installation of Nginx. As an example, if you are running Debian's wheezy release, and want to get a newer version of Nginx, you can install the `wheezy-backports` repository and set that value here, and Ansible will use that as the `-t` option while installing Nginx.
nginx_debian_repo_enabled: false
nginx_debian_repo_flavour: stable
(For Debian only) Allows you to use the official Nginx Repo instead of the system's package. You can set the flavour to `stable` or `mainline`.