load_module modules/ngx_http_brotli_filter_module.so;
load_module modules/ngx_http_brotli_static_module.so;

http {
  ....
        brotli on;
        brotli_comp_level 4;
        brotli_types application/atom+xml application/javascript application/json application/rss+xml application/vnd.ms-fontobject application/x-font-opentype application/x-font-truetype application/x-font-ttf application/x-javascript application/xhtml+xml application/xml font/eot font/opentype font/otf font/truetype image/svg+xml image/vnd.microsoft.icon image/x-icon image/x-win-bitmap text/css text/javascript text/plain text/xml;

 .....
}