2021 October 17
Added a document explaining how to choose among the options
for the home page shown when a user visits the site:
https://scanalyst.fourmilab.ch/t/setting-a-default-home-page/137/2
Here is documentation on sending invitations to join the site:
https://meta.discourse.org/t/how-to-send-configure-and-accept-discourse-invitation-emails/124096
Any user with trust level 2 or greater can send an invitation.
(This, and other aspects of invitations, can be configured by
administrator settings.)
Added an "About" document for the Sand Box category.