What is Indie Hackers built on?

Hi, I was wondering if Courtland, Channing has the time or if anyone else knows what this website is built on. By that mean any particular technology or Stack.

I may be wanting to create a similar site, but for a completely different niche and I was wondering the technology behind it. I'm teaching myself how to code, so working on a project like this will be really helpful.

Thanks in advanced and I really enjoy learning from this community.