Include tags link for old repos in readmes (dotnet#2388)

README.aspnet.md

@@ -123,6 +123,9 @@ Tag | Dockerfile
 2.1.23-nanoserver-1809, 2.1-nanoserver-1809, 2.1.23, 2.1 | [Dockerfile](https://github.com/dotnet/dotnet-docker/blob/master/src/aspnet/2.1/nanoserver-1809/amd64/Dockerfile)
 
 You can retrieve a list of all available tags for dotnet/aspnet at https://mcr.microsoft.com/v2/dotnet/aspnet/tags/list.
+<!--End of generated tags-->
+
+For tags contained in the old dotnet/core/aspnet repository, you can retrieve a list of those tags at https://mcr.microsoft.com/v2/dotnet/core/aspnet/tags/list.
 
 # Support
 

README.runtime-deps.md

@@ -76,6 +76,9 @@ Tags | Dockerfile | OS Version
 2.1.23-bionic-arm32v7, 2.1-bionic-arm32v7 | [Dockerfile](https://github.com/dotnet/dotnet-docker/blob/master/src/runtime-deps/2.1/bionic/arm32v7/Dockerfile) | Ubuntu 18.04
 
 You can retrieve a list of all available tags for dotnet/runtime-deps at https://mcr.microsoft.com/v2/dotnet/runtime-deps/tags/list.
+<!--End of generated tags-->
+
+For tags contained in the old dotnet/core/runtime-deps repository, you can retrieve a list of those tags at https://mcr.microsoft.com/v2/dotnet/core/runtime-deps/tags/list.
 
 # Support
 

README.runtime.md

@@ -119,6 +119,9 @@ Tag | Dockerfile
 2.1.23-nanoserver-1809, 2.1-nanoserver-1809, 2.1.23, 2.1 | [Dockerfile](https://github.com/dotnet/dotnet-docker/blob/master/src/runtime/2.1/nanoserver-1809/amd64/Dockerfile)
 
 You can retrieve a list of all available tags for dotnet/runtime at https://mcr.microsoft.com/v2/dotnet/runtime/tags/list.
+<!--End of generated tags-->
+
+For tags contained in the old dotnet/core/runtime repository, you can retrieve a list of those tags at https://mcr.microsoft.com/v2/dotnet/core/runtime/tags/list.
 
 # Support
 

README.samples.md

@@ -102,6 +102,9 @@ dotnetapp-nanoserver-1809, dotnetapp, latest | [Dockerfile](https://github.com/d
 aspnetapp-nanoserver-1809, aspnetapp | [Dockerfile](https://github.com/dotnet/dotnet-docker/blob/master/samples/aspnetapp/Dockerfile)
 
 You can retrieve a list of all available tags for dotnet/samples at https://mcr.microsoft.com/v2/dotnet/samples/tags/list.
+<!--End of generated tags-->
+
+For tags contained in the old dotnet/core/samples repository, you can retrieve a list of those tags at https://mcr.microsoft.com/v2/dotnet/core/samples/tags/list.
 
 # Support
 

README.sdk.md

@@ -123,6 +123,9 @@ Tag | Dockerfile
 2.1.811-nanoserver-1809, 2.1-nanoserver-1809, 2.1.811, 2.1 | [Dockerfile](https://github.com/dotnet/dotnet-docker/blob/master/src/sdk/2.1/nanoserver-1809/amd64/Dockerfile)
 
 You can retrieve a list of all available tags for dotnet/sdk at https://mcr.microsoft.com/v2/dotnet/sdk/tags/list.
+<!--End of generated tags-->
+
+For tags contained in the old dotnet/core/sdk repository, you can retrieve a list of those tags at https://mcr.microsoft.com/v2/dotnet/core/sdk/tags/list.
 
 # Support
 

eng/readme-templates/README.md

@@ -80,6 +80,9 @@ The [.NET Docker samples](https://github.com/dotnet/dotnet-docker/blob/master/sa
 * [dotnet/framework/samples](https://hub.docker.com/_/microsoft-dotnet-framework-samples/): .NET Framework, ASP.NET and WCF Samples
 
 {{if !IS_PRODUCT_FAMILY:# Full Tag Listing
+<!--End of generated tags-->
+
+For tags contained in the old dotnet/core{{if (PARENT_REPO = "nightly"):-nightly}}/{{SHORT_REPO}} repository, you can retrieve a list of those tags at https://mcr.microsoft.com/v2/dotnet/core{{if (PARENT_REPO = "nightly"):-nightly}}/{{SHORT_REPO}}/tags/list.
 
 }}# Support