When placed into an .htaccess
file or a
<Directory>
or <Location>
section,
this directive forces all matching files to be served as the
content type given by media type. For example, if you had
a directory full of GIF files, but did not want to label them all
with ".gif", you might want to use:
ForceType image/gif
Note that this will override any filename extensions that might determine the media type.