Use HTTP/2

I have been using Lighthouse to optimize my site and they tell me to use HTTP/2 for improvements.  It looks like your service is on https/1.1.  

Here's what they say: HTTP/2 offers many benefits over HTTP/1.1, including binary headers and multiplexing.

Also, they suggest using this link to configure nginx and other servers: https://dassur.ma/things/h2setup/

My site would benefit by an estimated 0.63 seconds and I'd love to shave that time off.