install ffmpeg in container

Mikibot.Analyze/Dockerfile

@@ -1,5 +1,11 @@
 #See https://aka.ms/customizecontainer to learn how to customize your debug container and how Visual Studio uses this Dockerfile to build your images for faster debugging.
 
+FROM mcr.microsoft.com/dotnet/runtime:8.0 AS run
+USER root
+RUN apt update
+RUN apt install -y ffmpeg
+
+
 FROM mcr.microsoft.com/dotnet/runtime:8.0 AS base
 USER app
 WORKDIR /app
@@ -21,7 +27,8 @@ FROM build AS publish
 ARG BUILD_CONFIGURATION=Release
 RUN dotnet publish "./Mikibot.Analyze.csproj" -c $BUILD_CONFIGURATION -o /app/publish /p:UseAppHost=false
 
-FROM base AS final
+FROM run AS final
+USER app
 WORKDIR /app
 COPY --from=publish /app/publish .
 ENTRYPOINT ["dotnet", "Mikibot.Analyze.dll"]