Manifest.json are they not supported?

Error Message

Hi guys, do you know if manifest.json is supported on infinityfree free tier? it is loading up as Content-Type: text/html but need to be Content-Type: application/manifest+json in the system. It keeps showing parsing error because in develop tools it starts with HTML despite in browser showing correctly if directly pointed to the file.

See

Thanks mate i’ll check it out, seems like what i need!