Update docker build

BeatmapDifficultyLookupCache/Dockerfile

@@ -1,4 +1,4 @@
-FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build-env
+FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build-env
 WORKDIR /app
 
 # Copy csproj and restore as distinct layers
@@ -12,10 +12,10 @@ RUN dotnet publish -c Release -o out
 RUN rm -rf ./out/runtimes ./out/osu.Game.Resources.dll
 
 # Build runtime image
-FROM mcr.microsoft.com/dotnet/aspnet:6.0
+FROM mcr.microsoft.com/dotnet/aspnet:8.0
 WORKDIR /app
 COPY --from=build-env /app/out .
 COPY docker docker
 
 # see https://github.com/dotnet/runtime/issues/66707 for issue handling signals on arm64
-ENTRYPOINT ["/app/docker/wait_term.sh", "BeatmapDifficultyLookupCache.dll"]
+ENTRYPOINT ["/app/docker/wait_term.sh", "BeatmapDifficultyLookupCache.dll"]