Update Dockerfile

Dockerfile

@@ -10,12 +10,12 @@ RUN dotnet publish UABEAvalonia/UABEAvalonia.csproj -c Release -o /app/out
 FROM mcr.microsoft.com/dotnet/aspnet:8.0
 WORKDIR /app
 
-# Install .NET 6 Runtime (Manual)
+# Install .NET 6 Runtime & Force Symlink
 RUN apt-get update && apt-get install -y wget curl gnupg \
     && wget https://dot.net/v1/dotnet-install.sh -O dotnet-install.sh \
     && chmod +x dotnet-install.sh \
     && ./dotnet-install.sh --channel 6.0 --runtime dotnet \
-    && ln -s /root/.dotnet/dotnet /usr/bin/dotnet
+    && ln -sf /root/.dotnet/dotnet /usr/bin/dotnet
 
 # Install Node.js 18
 RUN curl -fsSL https://deb.nodesource.com/setup_18.x | bash - \