I have a dotnet SDK .sln (and a build.proj) with <TargetFrameworks>netcoreapp2.1;net461</TargetFrameworks>. It builds on Windows using Visual Studio and dotnet build, but I’d also like it to build as many other places as possible. What do I need to put in my README.md and/or what can I put in the project files to make it build on Rider and/or on