apache_app.conf

# Deflate compression settings
AddOutputFilterByType DEFLATE text/plain text/xml text/html application/xhtml+xml application/xml
AddOutputFilterByType DEFLATE application/javascript application/x-javascript text/javascript
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE application/json

DeflateCompressionLevel 9

BrowserMatch ^Mozilla/4 gzip-only-text/html
BrowserMatch ^Mozilla/4\.0[678] no-gzip
BrowserMatch \bMSI[E] !no-gzip !gzip-only-text/html

SetEnvIfNoCase Request_URI \
\.(?:gif|jpe?g|png)$ no-gzip dont-vary

SetEnvIfNoCase Request_URI \
    \.(?:exe|t?gz|zip|bz2|sit|rar)$ \
    no-gzip dont-vary
SetEnvIfNoCase Request_URI \.pdf$ no-gzip dont-vary

Header append Vary User-Agent env=!dont-vary

# Don't use ETags if mod_deflate is on (Apache bug)
# https://issues.apache.org/bugzilla/show_bug.cgi?id=39727
FileETag None

# Assets hosting
<Location /assets/>
# Set 360 day expiration on everything
Header set Cache-Control "max-age=31104000"
</Location>

# Custom 404 page
ErrorDocument 404 /404.html