Add more GZIP options for nginx

[httpjamesm]

GZIP in nginx requires further configuration than gzip on to properly work and have an impact on performance.

I suggest adding the following lines to the nginx config to compress assets more for faster loading:

        gzip_vary on;
        gzip_proxied any;
        gzip_comp_level 6;
        gzip_buffers 16 8k;
        gzip_http_version 1.1;
        gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
        # Specify the minimum length of the response to compress (default 20)
        gzip_min_length 500;

[FireMasterK]

But why not use this in your existing reverse proxy? This wouldn't allow users to disable gzip if they wanted

[httpjamesm]

Well judging by the existing config, it seemed you wanted to enable gzip.

You can also make it an option in the docker compose file to enable gzip instead.