Three different WebGL builds of a Unity project hosted on Luna (IIS):
Uncompressed (Build files will have no extra extension)
GZip (Build files will end with .gz)
Brotli (Build files will end with .br)

You will need to adapt (or create) a `web.config` and put it in the root folder of your webapp like /domains/iPCN.luna.fhict.nl
You can find the correct contents of the web.config on the Unity Documentation.
For compressed WebGL build use "Server configuration for compressed WebGL builds without decompression fallback (IIS)".
For uncompressed WebGL build use "Server configuration for uncompressed WebGL builds (IIS)"