.NET Core 2.0 was released on August 14, 2017. As a non-LTS release, it is supported for 3 months after the next release. .NET Core 2.1 was released on May 30th, 2018. As a result, .NET Core 2.0 will be supported until September 1, 2018.

After that time, .NET Core patch updates will no longer include updated packages of container images for .NET Core 2.0. You should plan your upgrade from .NET Core 2.0 to 2.1 now.