Try add Dockerfile

Dockerfile

@@ -0,0 +1,30 @@
+# Base image for runtime
+FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS base
+USER app
+WORKDIR /app
+EXPOSE 8080
+EXPOSE 8081
+
+# Build stage for ASP.NET Core
+FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
+ARG BUILD_CONFIGURATION=Release
+WORKDIR /src
+COPY ["YatzyGame/YatzyGame.csproj", "./YatzyGame/"]
+RUN dotnet restore "./YatzyGame/YatzyGame.csproj"
+COPY . . 
+WORKDIR "/src"
+RUN dotnet build "./YatzyGame/YatzyGame.csproj" -c $BUILD_CONFIGURATION -o /app/build
+
+# Publish ASP.NET Core app
+FROM build AS publish
+ARG BUILD_CONFIGURATION=Release
+RUN dotnet publish "./YatzyGame/YatzyGame.csproj" -c $BUILD_CONFIGURATION -o /app/publish /p:UseAppHost=false
+
+# Copy Vue.js build output to ASP.NET Core wwwroot
+COPY --from=node-build /wwwroot/js/dist /app/publish/wwwroot/js/dist
+
+# Final runtime stage
+FROM base AS final
+WORKDIR /app
+COPY --from=publish /app/publish .
+ENTRYPOINT ["dotnet", "YatzyGame.dll"]