By default, it'll only send those headers when the response code is one of the following:
- 200, 201, 204, 206, 301, 302, 303, 304, 307 & 308

As all the traffics should be https, the http protocol only exists to do 301 redirect,
and always send the HSTS header is almost one of the best practices, we should set
nginx to do so.

Reference:
- https://nginx.org/en/docs/http/ngx_http_headers_module.html#add_header
- https://ssl-config.mozilla.org/

It's default turned on, but it's better to turn it off for security reason.

Reference:
- https://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl_session_tickets
- https://github.com/mozilla/server-side-tls/issues/135

This fixes a bug that prevents logins to mastodon onion services. The
nginx directive assumed all requests were made over https, causing a
domain mismatch for onion services that have https redirects disabled.
The fix more correctly sets X-Forwarded-Proto to the actual scheme used
in the request.

Maintain TLS v1.2 compatibility (might want to drop this later) and add support for TLS v1.3

So they can be copied during installation instead of looking
them up in the documentation

Make default sidekiq configuration use weighted queues

Remove deprecated docs directory