Update 'Preview 2' references in readme and samples to 'RC1' (dotnet#501

)

README.md

@@ -46,7 +46,7 @@ After the application starts, navigate to `http://localhost:8000` in your web br
 - [`1.0.11-runtime-jessie`, `1.0.11-runtime`, `1.0-runtime` (*1.0/runtime/jessie/amd64/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/nightly/1.0/runtime/jessie/amd64/Dockerfile)
 - [`1.0.11-runtime-deps-jessie`, `1.0.11-runtime-deps`, `1.0-runtime-deps`, `1-runtime-deps` (*1.0/runtime-deps/jessie/amd64/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/nightly/1.0/runtime-deps/jessie/amd64/Dockerfile)
 
-**.NET Core 2.1 Preview 2 tags**
+**.NET Core 2.1 RC1 tags**
 
 - [`2.1.300-rc1-sdk-stretch`, `2.1-sdk-stretch`, `2.1.300-rc1-sdk`, `2.1-sdk` (*2.1/sdk/stretch/amd64/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/nightly/2.1/sdk/stretch/amd64/Dockerfile)
 - [`2.1.300-rc1-sdk-alpine3.7`, `2.1-sdk-alpine3.7`, `2.1.300-rc1-sdk-alpine`, `2.1-sdk-alpine` (*2.1/sdk/alpine3.7/amd64/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/nightly/2.1/sdk/alpine3.7/amd64/Dockerfile)
@@ -66,7 +66,7 @@ After the application starts, navigate to `http://localhost:8000` in your web br
 - [`2.0.7-sdk-2.1.105-nanoserver-1709`, `2.0-sdk-nanoserver-1709`, `2.0.7-sdk-2.1.105`, `2.0-sdk`, `2-sdk`, `sdk`, `latest` (*2.0/sdk/nanoserver-1709/amd64/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/nightly/2.0/sdk/nanoserver-1709/amd64/Dockerfile)
 - [`2.0.7-runtime-nanoserver-1709`, `2.0-runtime-nanoserver-1709`, `2.0.7-runtime`, `2.0-runtime`, `2-runtime`, `runtime` (*2.0/runtime/nanoserver-1709/amd64/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/nightly/2.0/runtime/nanoserver-1709/amd64/Dockerfile)
 
-**.NET Core 2.1 Preview 2 tags**
+**.NET Core 2.1 RC1 tags**
 
 - [`2.1.300-rc1-sdk-nanoserver-1709`, `2.1-sdk-nanoserver-1709`, `2.1.300-rc1-sdk`, `2.1-sdk` (*2.1/sdk/nanoserver-1709/amd64/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/nightly/2.1/sdk/nanoserver-1709/amd64/Dockerfile)
 - [`2.1.0-rc1-aspnetcore-runtime-nanoserver-1709`, `2.1-aspnetcore-runtime-nanoserver-1709`, `2.1.0-rc1-aspnetcore-runtime`, `2.1-aspnetcore-runtime` (*2.1/aspnetcore-runtime/nanoserver-1709/amd64/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/nightly/2.1/aspnetcore-runtime/nanoserver-1709/amd64/Dockerfile)
@@ -80,7 +80,7 @@ After the application starts, navigate to `http://localhost:8000` in your web br
 - [`1.1.8-runtime-nanoserver-sac2016`, `1.1.8-runtime`, `1.1-runtime`, `1-runtime` (*1.1/runtime/nanoserver-sac2016/amd64/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/nightly/1.1/runtime/nanoserver-sac2016/amd64/Dockerfile)
 - [`1.0.11-runtime-nanoserver-sac2016`, `1.0.11-runtime`, `1.0-runtime` (*1.0/runtime/nanoserver-sac2016/amd64/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/nightly/1.0/runtime/nanoserver-sac2016/amd64/Dockerfile)
 
-**.NET Core 2.1 Preview 2 tags**
+**.NET Core 2.1 RC1 tags**
 
 - [`2.1.300-rc1-sdk-nanoserver-sac2016`, `2.1-sdk-nanoserver-sac2016`, `2.1.300-rc1-sdk`, `2.1-sdk` (*2.1/sdk/nanoserver-sac2016/amd64/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/nightly/2.1/sdk/nanoserver-sac2016/amd64/Dockerfile)
 - [`2.1.0-rc1-aspnetcore-runtime-nanoserver-sac2016`, `2.1-aspnetcore-runtime-nanoserver-sac2016`, `2.1.0-rc1-aspnetcore-runtime`, `2.1-aspnetcore-runtime` (*2.1/aspnetcore-runtime/nanoserver-sac2016/amd64/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/nightly/2.1/aspnetcore-runtime/nanoserver-sac2016/amd64/Dockerfile)
@@ -91,7 +91,7 @@ After the application starts, navigate to `http://localhost:8000` in your web br
 - [`2.0.7-runtime-stretch-arm32v7`, `2.0-runtime-stretch-arm32v7`, `2.0.7-runtime`, `2.0-runtime`, `2-runtime`, `runtime` (*2.0/runtime/stretch/arm32v7/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/nightly/2.0/runtime/stretch/arm32v7/Dockerfile)
 - [`2.0.7-runtime-deps-stretch-arm32v7`, `2.0-runtime-deps-stretch-arm32v7`, `2.0.7-runtime-deps`, `2.0-runtime-deps`, `2-runtime-deps`, `runtime-deps` (*2.0/runtime-deps/stretch/arm32v7/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/nightly/2.0/runtime-deps/stretch/arm32v7/Dockerfile)
 
-**.NET Core 2.1 Preview 2 tags**
+**.NET Core 2.1 RC1 tags**
 
 - [`2.1.300-rc1-sdk-stretch-arm32v7`, `2.1-sdk-stretch-arm32v7`, `2.1.300-rc1-sdk`, `2.1-sdk` (*2.1/sdk/stretch/arm32v7/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/nightly/2.1/sdk/stretch/arm32v7/Dockerfile)
 - [`2.1.300-rc1-sdk-bionic-arm32v7`, `2.1-sdk-bionic-arm32v7` (*2.1/sdk/bionic/arm32v7/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/nightly/2.1/sdk/bionic/arm32v7/Dockerfile)

samples/aspnetapp/aspnet-docker-dev-in-container.md

@@ -18,7 +18,7 @@ You can also [download the repository as a zip](https://github.com/dotnet/dotnet
 
 ## Requirements
 
-The instructions below use .NET Core 2.1 Preview 2 images. It is possible to make this scenario work with .NET Core 2.0 images but requires extra work and a bit of magic. On your local machine, you can use either .NET Core 2.1 or .NET Core 2.0 projects to try out these instructions.
+The instructions below use .NET Core 2.1 RC1 images. It is possible to make this scenario work with .NET Core 2.0 images but requires extra work and a bit of magic. On your local machine, you can use either .NET Core 2.1 or .NET Core 2.0 projects to try out these instructions.
 
 It is recommended that you add a [Directory.Build.props](Directory.Build.props) file to your project to use different `obj` and `bin` folders for local and container use, to avoid conflicts between them. You should delete your existing obj and bin folders before making this change. You can also use `dotnet clean` for this purpose.
 

samples/dotnetapp/dotnet-docker-dev-in-container.md

@@ -18,7 +18,7 @@ You can also [download the repository as a zip](https://github.com/dotnet/dotnet
 
 ## Requirements
 
-The instructions below use .NET Core 2.1 Preview 2 images. It is possible to make this scenario work with .NET Core 2.0 but requires many extra steps and a bit of magic. You do not need to switch to .NET Core 2.1 on your local machine to try out these instructions. They will work fine with .NET Core 2.0 projects.
+The instructions below use .NET Core 2.1 RC1 images. It is possible to make this scenario work with .NET Core 2.0 but requires many extra steps and a bit of magic. You do not need to switch to .NET Core 2.1 on your local machine to try out these instructions. They will work fine with .NET Core 2.0 projects.
 
 This approach relies on [volume mounting](https://docs.docker.com/engine/admin/volumes/volumes/) (that's the `-v` argument in the following commands) to mount source into the container (without using a Dockerfile). You may need to [Enable shared drives (Windows)](https://docs.docker.com/docker-for-windows/#shared-drives) or [file sharing (macOS)](https://docs.docker.com/docker-for-mac/#file-sharing) first.
 

scripts/TagsDocumentationTemplate.md

@@ -11,7 +11,7 @@ $(TagDoc:1.1.8-runtime-jessie)
 $(TagDoc:1.0.11-runtime-jessie)
 $(TagDoc:1.0.11-runtime-deps-jessie)
 
-**.NET Core 2.1 Preview 2 tags**
+**.NET Core 2.1 RC1 tags**
 
 $(TagDoc:2.1.300-rc1-sdk-stretch)
 $(TagDoc:2.1.300-rc1-sdk-alpine3.7)
@@ -31,7 +31,7 @@ $(TagDoc:2.1.0-rc1-runtime-deps-bionic)
 $(TagDoc:2.0.7-sdk-2.1.105-nanoserver-1709)
 $(TagDoc:2.0.7-runtime-nanoserver-1709)
 
-**.NET Core 2.1 Preview 2 tags**
+**.NET Core 2.1 RC1 tags**
 
 $(TagDoc:2.1.300-rc1-sdk-nanoserver-1709)
 $(TagDoc:2.1.0-rc1-aspnetcore-runtime-nanoserver-1709)
@@ -45,7 +45,7 @@ $(TagDoc:1.1.8-sdk-1.1.9-nanoserver-sac2016)
 $(TagDoc:1.1.8-runtime-nanoserver-sac2016)
 $(TagDoc:1.0.11-runtime-nanoserver-sac2016)
 
-**.NET Core 2.1 Preview 2 tags**
+**.NET Core 2.1 RC1 tags**
 
 $(TagDoc:2.1.300-rc1-sdk-nanoserver-sac2016)
 $(TagDoc:2.1.0-rc1-aspnetcore-runtime-nanoserver-sac2016)
@@ -56,7 +56,7 @@ $(TagDoc:2.1.0-rc1-runtime-nanoserver-sac2016)
 $(TagDoc:2.0.7-runtime-stretch-arm32v7)
 $(TagDoc:2.0.7-runtime-deps-stretch-arm32v7)
 
-**.NET Core 2.1 Preview 2 tags**
+**.NET Core 2.1 RC1 tags**
 
 $(TagDoc:2.1.300-rc1-sdk-stretch-arm32v7)
 $(TagDoc:2.1.300-rc1-sdk-bionic-arm32v7)