# Don't cache content or styles / scripts served by us.
<FilesMatch "\.(html|js|css)$">
  FileETag None
  <IfModule mod_headers.c>
     Header unset ETag
     Header set Cache-Control "no-cache"
  </IfModule>
</FilesMatch>

# Cache large files (e.g. images) for a short period of time.
<FilesMatch "\.(gif|jpg|png)$">
  FileETag None
  <IfModule mod_headers.c>
     Header unset ETag
     # 5 minutes
     Header set Cache-Control "max-age=300"
  </IfModule>
</FilesMatch>