Foxy can be used as a simple HTTP server that can serve files under the httproot root directory. No CGI, SSI, or other advanced features, sorry. Content type is guessed automatically by file extension, the rules are hardcoded. For instance, for *.html files content type will be text/html. When a directory is requested, Foxy will serve index.html located in that directory (except for the root directory).
Requests for some resources located directly under the http root directory are handled internally. You cannot have files with the same names. Here's the full list of paths handled internally:
/
/null.gif
/null.swf
/report
/reports
/logout
/filters
/update-filter
/new-filter
/add-filter
/whitelist
/update-whitelist
/proxies
/update-proxy-mapping
/add-proxy-mapping
/toggle
/toggle-update
/register
/activate-product