I have just finished migrating the services mentioned above to new domains, and also to hosting on the lemmy.ml server, instead of my personal server. This makes sense because all of them are used almost exclusively for Lemmy development. It will also allow @firstname.lastname@example.org to administrate the services in case of problems.
The new domains are:
There are redirects in place, so you will automatically be forwarded from old domains to new ones.