found a website
which offers the valuable service of taking your site offline for the duration of Shabbat. There are several discussions of this issue in the fifth volume of Be-Mareh ha-Bazak
(Jerusalem 2003), which seem to say that a) unless the website is taking money for a single transaction, there is no problem with leaving it up over Shabbat. b) even if it is, if most of the users are not Jewish, there is no need to take it down because of the possibility of Jews using it.
Avakesh has a video
about preparing for Pesach.
And Shmuel Ben-Artzi
(father of Hagai
) has published a novel about Novardok