Which tech stack should I choose today?

I wanna make an application that might grow in future. I want to add different features to it like a module and not everyone can access those modules. It will have, chat option / media files / video publishing / articles / data visualization etc. It should not be resource hungry and scalable in the future.

At this point, which tech stack should I really choose? Security is a major concern.

Some might suggest to choose node.js, but the amount of external package is required is just too much for me. I feel like it's a huge red flag for security.

I'm leaning towards (dotnet 8 + postgres, any lite js fremework for frontend). What do you say?