Thanks, Even if the site is open or close source, I also don't understand how to check the code.
You would need some knowledge in programming languages to be able to interpret the code, but open source code is usually available in platforms like Github or Gitlabs. Most services that are open source share the link to their source codes within their websites.
Is there some issue with the host? Unable to connect to the site right now.
It works for me. Maybe it was a temporary downtime
Alternatively, you can also use their Tor mirror if you find that the clearnet is not connecting:
http://hszyoqwrcp7cxlxnqmovp6vjvmnwj33g4wviuxqzq47emieaxjaperyd.onion/