Update Dockerfile

Dockerfile

@@ -1,4 +1,4 @@
-FROM mcr.microsoft.com/dotnet/sdk:6.0-focal AS build
+FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
 WORKDIR /app
 
 COPY . .
@@ -7,7 +7,7 @@ RUN dotnet restore
 WORKDIR /app/CreatorKit
 RUN dotnet publish -c release -o /out --no-restore
 
-FROM mcr.microsoft.com/dotnet/aspnet:6.0-focal AS runtime
+FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS runtime
 WORKDIR /app
 COPY --from=build /out .
 ENTRYPOINT ["dotnet", "CreatorKit.dll"]