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Learn how to dockerize an ASP.NET Core app in .NET 9 with a step-by-step Dockerfile tutorial, best practices, and deployment tips. Start containerizing today! If you want to dockerize an ASP.NET Core app , .NET 9 makes it easier than any previous release. Containers have become the default way to ship web applications — every major cloud (Azure, AWS, Google Cloud) runs them natively, and "it works on my machine" bugs largely disappear when your app ships with its entire runtime environment. In this tutorial, you'll learn how to containerize a .NET 9 ASP.NET Core application with a production-ready Dockerfile, understand why each instruction matters, run it locally with Docker Compose, and deploy it to the cloud. We'll also cover the built-in SDK container publishing feature that lets you skip the Dockerfile entirely. Why Dockerize an ASP.NET Core App? Before writing any code, it's worth understanding what containers actually buy you, because the "why...

Learn how to use Docker with .NET 9 to containerize and deploy your ASP.NET Core app. Step-by-step tutorial with Dockerfile examples. Start building today! If you're building modern web APIs or web apps, learning how to use Docker with .NET 9 is one of the highest-leverage skills you can pick up in 2026. Containers let you package your ASP.NET Core application — code, runtime, and dependencies — into a single portable image that runs identically on your laptop, your teammate's machine, and production in the cloud. In this tutorial, you'll learn how to containerize an ASP.NET Core app from scratch, write an optimized Dockerfile, use Docker Compose for multi-container setups, and deploy with confidence. By the end, you'll understand not just how to dockerize ASP.NET Core, but why each step matters — including the performance and security trade-offs that separate a beginner image from a production-ready one. Why Use Docker with .NET 9? The phrase "it ...