Enable gzip in nginx

[mburns]

took a swing at #51, untested

Two knobs to consider adjusting:

• gzip_min_length - recommendations can range from (256, 500, 1024) bytes.
• gzip_comp_level - set at 6, but not sure this is even worth setting explicitly (default is is 1)

Sources:

• https://gist.github.com/v0lkan/90fcb83c86918732b894
• https://www.digitalocean.com/community/tutorials/how-to-improve-website-performance-using-gzip-and-nginx-on-ubuntu-20-04
• https://ubiq.co/tech-blog/how-to-enable-nginx-gzip-compression/

[bromagosa]

Thank you for your contribution. However, I am a bit hesitant to spend time testing this when you explicitly say you haven't tested it yourself :)

Any chance you can try your code first, and get back to us?

Thanks!