sites-available.example is a sample /etc/nginx/sites-available/example.com file
snippets/* are sample snippets for /etc/nginx/snippets/
For standard installs, run nginx.sh for easy configuration with prompts.
For non-standard installations, DIY.
If you use cloudflare, please read these articles to setup proper IP forwarding and geolocation headers. Similar steps would apply to other CDNs/reverse proxies.