It might be somewhat simple, but their paid Visual Studio IDE demonstrates no way to get there, and it probably should. The only project types tagged as services are .NET Framework templates to make a Windows service.

I have to apparently read blog posts about how to get there myself with .NET Core. Suffice to say, Microsoft's move to the open source/Linux mindset may have come at the cost of being similarly confusing to get started with.

Note that your blogs happily tell me to add a single NuGet package for Windows or Linux, but doesn't bother to tell me how to assemble a project that will work on both.