FIX: serve statically compressed files when available

PERF: default gzip to level 5

config/nginx.sample.conf

@@ -28,6 +28,7 @@ server {
   listen 80;
   gzip on;
   gzip_min_length 1000;
+  gzip_comp_level 5;
   gzip_types application/json text/css application/x-javascript application/javascript;
 
   server_name enter.your.web.hostname.here;
@@ -61,6 +62,7 @@ server {
 
     location ~ ^/assets/ {
       expires 1y;
+      gzip_static on;
       add_header ETag "";
       add_header Cache-Control public;
       break;