Set up a mailinglist

[surchs]

For folks who are interested but won't immediately start using neurobagel, a mailing list with occasional updates on releases or features would be helpful. This might/should(?) be distinct from the (so far unused) google-group we have, and also from discord/neurostars.

Options are:

• https://mailchimp.com/
• https://www.useplunk.com/
• ...