.htaccess

# GZip compression
<IfModule mod_deflate.c>
    AddOutputFilterByType DEFLATE text/plain
    AddOutputFilterByType DEFLATE text/html
    AddOutputFilterByType DEFLATE text/css
    AddOutputFilterByType DEFLATE application/javascript
    AddOutputFilterByType DEFLATE application/x-javascript
</IfModule>

# Leverage browser caching
<IfModule mod_expires.c>
    ExpiresActive On
    ExpiresDefault "access plus 1 week"
    ExpiresByType image/jpg "access plus 1 week"
    ExpiresByType image/jpeg "access plus 1 week"
    ExpiresByType image/png "access plus 1 week"
    ExpiresByType image/svg+xml "access plus 1 week"
    ExpiresByType image/gif "access plus 1 hour"
    ExpiresByType text/html "access plus 1 hour"
    ExpiresByType text/css "access plus 1 month"
    ExpiresByType text/javascript "access plus 1 month"
    ExpiresByType text/x-javascript "access plus 1 month"
</IfModule>

# ----------------------------------------------------------------------
# Instructs the proxies to cache two versions of the resource: one compressed, and one uncompressed.
# https://developers.google.com/speed/docs/best-practices/caching#LeverageProxyCaching
# ----------------------------------------------------------------------
<IfModule mod_headers.c>
  <FilesMatch "\.(js|css|xml|gz)$">
    Header append Vary: Accept-Encoding
  </FilesMatch>
</IfModule>