Migration of diasp.in to Hetzner

We have been hosting our services on Vultr (vultr.com) and it is proving to be costly with the ever increasing storage needs. We will now be migrating to Hetzner which will provide us added storage and computational resources at a much lesser price.

Migration plan - https://pad.disroot.org/p/diasp.in-migration

Migration tasks - https://gitlab.com/piratemovin/diasp.in/-/boards/1981036?milestone_title=Server%20Migration%20to%20Hetzner

Requesting members to review the plan and suggest improvements/changes if any.