#Add below Cache-Control Headers to .htaccess file
### CACHE-CONTROL HEADERS ###
<filesMatch ".(jpg|jpeg|png|gif|ico)$">
Header set Cache-Control "max-age=31536000, public"
</filesMatch>
<filesMatch ".(css|js)$">
Header set Cache-Control "max-age=2628000, public"
</filesMatch>
### CACHE-CONTROL HEADERS ###