Possible dockerfile fix

Dockerfile

@@ -2,20 +2,20 @@
 WORKDIR /app
 EXPOSE 5000
 
-FROM mcr.microsoft.com/dotnet/sdk:7.0 AS build
+FROM mcr.microsoft.com/dotnet/sdk:7.0-bullseye-slim-amd64 AS build
 WORKDIR /src
-RUN ls
-RUN ls ./
-COPY ["MauMau-Server.csproj", "./"]
-RUN dotnet restore "MauMau-Server.csproj"
+ARG TARGETARCH
+ARG TARGETOS
+RUN arch=$TARGETARCH \
+    && if [ "$arch" = "amd64" ]; then arch="x64"; fi \
+    && echo $TARGETOS-$arch > /tmp/rid
+COPY *.csproj .
+RUN dotnet restore -r $(cat /tmp/rid)
 COPY . .
 WORKDIR "/src"
-RUN dotnet build "MauMau-Server.csproj" -c Release -o /app/build
-
-FROM build AS publish
-RUN dotnet publish "MauMau-Server.csproj" -c Release -o /app/publish
+RUN dotnet publish -c Release -o /app -r $(cat /tmp/rid) --self-contained false --no-restore
 
 FROM base AS final
 WORKDIR /app
-COPY --from=publish /app/publish .
+COPY --from=build /app .
 ENTRYPOINT ["dotnet", "MauMau-Server.dll"]