Removed Reference to buildpack-deps in SDK

[mthalman]

Removed Reference to buildpack-deps in SDK

With the release of .NET 5.0 Preview 3, the SDK Docker images for Ubuntu and Debian have been updated to longer reference buildpack-deps as their base image. This is considered a breaking change because any dependencies that existed on that base image may potentially be affected.

Details

Instead of using buildpack-deps as the base image, these SDK images now reference the aspnet images. This change was made in order to provide more layer sharing amongst the set of .NET Docker images and to help reduce the security surface area. See #1814 for more details.

To compensate for the loss of certain packages that were contained in the buildpack-deps base image, the following packages have been explicitly added to the SDK images:

• curl
• git
• wget

The following tags are affected by this change:

• mcr.microsoft.com/dotnet/core/sdk:5.0
• mcr.microsoft.com/dotnet/core/sdk:5.0-buster
• mcr.microsoft.com/dotnet/core/sdk:5.0-buster-arm64v8
• mcr.microsoft.com/dotnet/core/sdk:5.0-buster-arm32v7
• mcr.microsoft.com/dotnet/core/sdk:5.0-focal
• mcr.microsoft.com/dotnet/core/sdk:5.0-focal-arm64v8
• mcr.microsoft.com/dotnet/core/sdk:5.0-focal-arm32v7