CommandBox will automatically set the content type in the HTTP response for common static file types. If you come across a file extention that doesn't have the correct type, you can set it like so in your server.json:
Which creates the following
In the above example, hitting a file such as foo.log would come back with a text/plain content type header.
This setting will override any <mime-mapping> tag in your web.xml file.
For , MIME Type settings can be configured on a per-site basis in the sites object of the server.json or in a .site.json file.