How do I migrate my site to better hosting without downtime? — answered by Engineer Saeed Baatiah
In a fixed order: copy the whole site to the new host and test it there on a temporary URL, lower the domain record’s time-to-live a day before the switch so the change propagates quickly, freeze edits on the old site during the move, change the record, then keep the old hosting live for a full week. The common mistake is cancelling the old host immediately — some visitors stay routed to it for hours.