Dockerfile update for multi-arch building.

Dockerfile

@@ -1,4 +1,4 @@
-FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build-env
+FROM --platform=$BUILDPLATFORM mcr.microsoft.com/dotnet/sdk:8.0 AS build-env
 ARG TARGETPLATFORM
 ARG BUILDPLATFORM
 ARG TARGETARCH
@@ -9,43 +9,10 @@ WORKDIR /app
 COPY . ./
 
 RUN dotnet restore -a $TARGETARCH src/fhir-candle/fhir-candle.csproj
-#RUN dotnet build  -a $TARGETARCH src/fhir-candle/fhir-candle.csproj -c Release -o out
-RUN dotnet publish -a $TARGETARCH src/fhir-candle/fhir-candle.csproj -c Release -o out
-
-#
-## Build with platform-specific .Net RID
-#RUN if [ "$TARGETPLATFORM" = "linux/amd64" ]; then \
-        #dotnet restore src/fhir-candle/fhir-candle.csproj --arch x64; \
-        #dotnet publish src/fhir-candle/fhir-candle.csproj -c Release -o out --framework net8.0 --arch x64; \
-    #elif [ "$TARGETPLATFORM" = "linux/arm64" ]; then \
-        #dotnet restore src/fhir-candle/fhir-candle.csproj --arch arm64; \
-        #dotnet publish src/fhir-candle/fhir-candle.csproj -c Release -o out --framework net8.0 --arch arm64; \
-    #elif [ "$TARGETPLATFORM" = "windows/x64" ]; then \
-        #dotnet restore src/fhir-candle/fhir-candle.csproj --arch x64; \
-        #dotnet publish src/fhir-candle/fhir-candle.csproj -c Release -o out --framework net8.0 --arch x64; \
-    #elif [ "$TARGETPLATFORM" = "windows/arm64" ]; then \
-        #dotnet restore src/fhir-candle/fhir-candle.csproj --arch arm64; \
-        #dotnet publish src/fhir-candle/fhir-candle.csproj -c Release -o out --framework net8.0 --arch arm64; \
-    #elif [ "$TARGETPLATFORM" = "darwin/x64" ]; then \
-        #dotnet restore src/fhir-candle/fhir-candle.csproj --arch x64; \
-        #dotnet publish src/fhir-candle/fhir-candle.csproj -c Release -o out --framework net8.0 --arch x64; \
-    #elif [ "$TARGETPLATFORM" = "darwin/arm64" ]; then \
-        #dotnet restore src/fhir-candle/fhir-candle.csproj --arch arm64; \
-        #dotnet publish src/fhir-candle/fhir-candle.csproj -c Release -o out --framework net8.0 --arch arm64; \
-    #else \
-        ##echo "Unsupported architecture: $TARGETPLATFORM"; \
-        ##exit 1; \
-        #dotnet restore src/fhir-candle/fhir-candle.csproj; \
-        #dotnet publish src/fhir-candle/fhir-candle.csproj -c Release -o out --framework net8.0; \
-    #fi;
-
-#RUN dotnet publish src/fhir-candle/fhir-candle.csproj -c Release -o out --framework net8.0;
-#RUN dotnet restore src/fhir-candle/fhir-candle.csproj
-#RUN dotnet publish src/fhir-candle/fhir-candle.csproj -c Release -o out
-
+RUN dotnet publish -a $TARGETARCH src/fhir-candle/fhir-candle.csproj -c Release -o out --no-restore
 
 # Build runtime image
-FROM mcr.microsoft.com/dotnet/aspnet:8.0
+FROM --platform=$BUILDPLATFORM mcr.microsoft.com/dotnet/aspnet:8.0
 WORKDIR /app
 COPY --from=build-env /app/out .
 ENTRYPOINT ["dotnet", "fhir-candle.dll"]