To enable gzip compression, create the file:
/etc/nginx-sp/vhosts.d/APPNAME.d/gzip.conf
with the following contents:
gzip on;
# text/html does not need to be listed as it is always included by nginx
gzip_types text/plain text/css application/json application/x-javascript
text/xml application/xml application/xml+rss text/javascript
application/javascript;
gzip_vary on;
Then, restart Nginx by running this command as root:
sudo service nginx-sp restart