Dockerize App based .NET Framework 4.6.1

I have a Rest API based on .Net framework 4.6.1
I want to dockerize this API, but the problem is that I can't find a solution?

All the solutions I found are almost all dedicated to other versions, for example, version 4.6.2, 4.7.0 etc.

Can anyone recommend me the base image that I can use to build this application?

I used mcr.microsoft.com/dotnet/framework/aspnet:4.8 but it is not suitable for my project.