ci: adjust project for .net 8 support

Server/Dockerfile

@@ -1,18 +1,28 @@
-FROM mcr.microsoft.com/dotnet/runtime:8.0 AS base
+FROM mcr.microsoft.com/dotnet/runtime:8.0-bookworm-slim AS base
 WORKDIR /app
 
-FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
+FROM --platform=$BUILDPLATFORM mcr.microsoft.com/dotnet/sdk:8.0-bookworm-slim AS build
+ARG TARGETARCH
+ENV TZ=Etc/UTC
+ENV DOTNET_TieredPGO=1
+ENV DOTNET_CLI_TELEMETRY_OPTOUT=1
+
+RUN echo "Target: $TARGETARCH"
+RUN echo "Build: $BUILDPLATFORM"
 WORKDIR /src
+COPY ["Wonderking/Wonderking.csproj", "Wonderking/"]
 COPY ["Server/Server.csproj", "Server/"]
-RUN dotnet restore "Server/Server.csproj"
+RUN dotnet restore "Wonderking/Wonderking.csproj" -a $TARGETARCH
+RUN dotnet restore "Server/Server.csproj" -a $TARGETARCH
 COPY . .
-WORKDIR "/src/Server"
-RUN dotnet build "Server.csproj" -c Release -o /app/build
 
 FROM build AS publish
-RUN dotnet publish "Server.csproj" -c Release -o /app/publish /p:UseAppHost=false
+RUN dotnet publish "Server/Server.csproj" -c Release -a $TARGETARCH --no-restore -f net8.0 -o /app
 
 FROM base AS final
 WORKDIR /app
-COPY --from=publish /app/publish .
-ENTRYPOINT ["dotnet", "Server.dll"]
+COPY --from=publish /app .
+USER $APP_UID
+ENTRYPOINT ["./Server"]
+
+

Server/Server.csproj

@@ -2,13 +2,13 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net7.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>warnings</Nullable>
     <DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
     <RootNamespace>Server</RootNamespace>
     <LangVersion>default</LangVersion>
     <ServerGarbageCollection>true</ServerGarbageCollection>
+    <TargetFrameworks>net8.0;net7.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>