Doc Update Suggestion

A little while ago I migrated my project to dotnet 8 and I noticed that the Getting Started documentation is a little outdated, for example:

• A namespace is being declared in the Program class
• The Program class is being declared
• The Program class is implementing the Main method
• Not using WebApplication.CreateBuilder

Not that these points are serious problems, but I believe that the documentation could be updated.

During the migration I I implemented my Main class a little differently and published this article on medium to demonstrate my approach.

I am willing to make a PR if you fine folks think this kind of changes is welcome.