Add HTTPS and letsencrypt compatibility.

[lucasmaurice]

No description provided.

[lae]

I think this should probably just be implemented as an example playbook (e.g. #17) showing how to deploy netbox with nginx and an SSL certificate (which is what I did at my previous job, using idolactivities.nginx_reverse), rather than introducing an SSL configuration with Django.

[tyler-8]

There's nothing inherent to this role that would require special tuning to have HTTPS & LetsEncrypt in your NetBox environment. The most common and likely best practice for Django apps and HTTPs is to let the web server handle it (Nginx, Apache, Caddy, etc). There are many many dozens of examples on configuring HTTPS and LetsEncrypt out there, and plenty of Ansible roles to handle that functionality for you. Building an example in to this repo would just add another item that will get outdated and have to be maintained.