Instead of opening the WebSite project , open a WebApp .
So , on the Property Pages of your WebApp –> goto build events –>
build one time script for rebuilding the minified files on each build/rebuild of the project like so :
"$(ProjectDir)..\jsmin\jsmin" < "$(ProjectDir)\scripts\models\employee.js” > "$(ProjectDir)\scripts\models\employee.min.js"
(you must adjust the script line accordingly to the position of the JSMIN in your project)
this will create a few lines of code ..
Also , be careful to add newly created files to the project – Include in project . Check that it also entered into the Source Safe you are using.
Check in to all and let your team use the minified files on rebuilding the project.