Using custom media types with blop storage (vtt, webm, webp, ogg, etc)

[simonbusborg]

Well, @warren came to the rescue with this solution.

Add to program.cs

var customContentTypes = new FileExtensionContentTypeProvider();
customContentTypes.Mappings[".vtt"] = "text/vtt";

services.PostConfigure<StaticFileOptions>(opt =>
{
    opt.ContentTypeProvider = customContentTypes;
});