Agent Skills: dotnet-dockerfile

Create optimized, secure multi-stage Dockerfiles for .NET Core and ASP.NET Core applications. Use when (1) creating a new Dockerfile for a .NET project, (2) containerizing a .NET application, (3) optimizing an existing .NET Dockerfile, (4) setting up Docker for .NET 6/7/8+ apps, or (5) user mentions .NET and Docker/container together.