How to: Add a MIME-Type
Click the Hosting Features menu item if it is not already open.
Click the Htaccess menu item.
Click the [ MIME-Types ] link for the directory you’d like to manage..
In the “MIME-Type” column, enter the MIME-Type you would like to use for the given extensions. As you type, the field will auto-complete with various known MIME-Types. MIME-Types must be in the form: “<type>/<subtype>”.
In the “Extensions” column, enter a space separated list of extensions.
Click the ADD button.