+1 for mander.xyz. I'd also like to take this opportunity to see if @[email protected] would be interesting in joining me on https://fediverser.network, as it is one of the most interesting topic-based instances. It would be a great home to all the science-related subreddits and moderators that would be interested in migrating.
Yes, sorry, I remember looking at it in the past but got distracted. Is there somewhere where I can find information about what to do to join you and contribute? Should I create a reddit account?
The GitHub page would be the initial place to get started. It works as a separate service that needs to run alongside your Lemmy docker stack. You will need a reddit API key to allow users to login/register via Reddit.
I just advise to wait a bit because the current release is still working based on Lemmy 0.18.3 database schema. I will update it later this week.