Install debugging tools in the Docker container

Dockerfile

@@ -5,8 +5,9 @@ COPY . /app
 RUN dotnet publish -c Release -o out
 
 # TODO: is using aspnet correct here? Required for API but might break Bot
-FROM mcr.microsoft.com/dotnet/core/aspnet:3.1-alpine
+FROM mcr.microsoft.com/dotnet/core/sdk:3.1-alpine
 WORKDIR /app
+RUN dotnet tool install --global dotnet-trace && dotnet tool install --global dotnet-dump && dotnet tool install --global dotnet-counters
 COPY --from=build /app/PluralKit.*/bin/Release/netcoreapp3.1 ./
 
 ENTRYPOINT ["dotnet"]