Fix golang and alpine images.

playground/withdockerfile/WithDockerfile.AppHost/Program.cs

@@ -22,13 +22,13 @@
     {
         var timestamp = DateTime.Now.ToString("yyyyMMddHHmmss", System.Globalization.CultureInfo.InvariantCulture);
         return $"""
-            FROM golang:1.22-alpine AS builder
+            FROM mcr.microsoft.com/oss/go/microsoft/golang:1.23 AS builder
             WORKDIR /app
             COPY . .
             RUN echo "Built at {timestamp}" > /build-info.txt
             RUN go build -o qots .
 
-            FROM alpine:latest
+            FROM mcr.microsoft.com/cbl-mariner/base/core:2.0
             COPY --from=builder /app/qots /qots
             COPY --from=builder /build-info.txt /build-info.txt
             ENTRYPOINT ["/qots"]
@@ -41,14 +41,14 @@ ENTRYPOINT ["/qots"]
     {
         // Simulate reading from a template or external source
         await Task.Delay(1, context.CancellationToken);
-        var baseImage = Environment.GetEnvironmentVariable("BASE_IMAGE") ?? "golang:1.22-alpine";
+        var baseImage = Environment.GetEnvironmentVariable("BASE_IMAGE") ?? "mcr.microsoft.com/oss/go/microsoft/golang:1.23";
         return $"""
             FROM {baseImage} AS builder
             WORKDIR /app
             COPY . .
             RUN go build -o qots .
 
-            FROM alpine:latest
+            FROM mcr.microsoft.com/cbl-mariner/base/core:2.0
             COPY --from=builder /app/qots /qots
             ENTRYPOINT ["/qots"]
             """;