Fix golang and alpine images.

[mitchdenny]

Fixing up some supply chain warnings on internal builds that are generating warning noise.

[github-actions]

🚀 Dogfood this PR with:

⚠️ WARNING: Do not do this without first carefully reviewing the code of this PR to satisfy yourself it is safe.

curl -fsSL https://raw.githubusercontent.com/dotnet/aspire/main/eng/scripts/get-aspire-cli-pr.sh | bash -s -- 12592

Or

• Run remotely in PowerShell:

iex "& { $(irm https://raw.githubusercontent.com/dotnet/aspire/main/eng/scripts/get-aspire-cli-pr.ps1) } 12592"

[Copilot]

Pull Request Overview

This PR updates Docker base images in the WithDockerfile playground application from community images to Microsoft-provided container images for better security and support.

• Updated Go builder image from golang:1.22-alpine to mcr.microsoft.com/oss/go/microsoft/golang:1.23
• Updated runtime base image from alpine:latest to mcr.microsoft.com/cbl-mariner/base/core:2.0
• Changes applied consistently across both sync and async dynamic Dockerfile generation examples

Comments suppressed due to low confidence (1)

playground/withdockerfile/WithDockerfile.AppHost/Program.cs:11

• The default Go version parameter is still set to '1.22', but the dynamic Dockerfile generators now use golang:1.23. Consider updating this parameter default to '1.23' to maintain consistency across the codebase.

var goVersion = builder.AddParameter("goversion", "1.22");