Hosted builders are a fast way to get a first version live. As usage grows, the monthly bill grows too, and many owners realise they don't fully control their code, data or domain.
Start with an inventory
List what the app actually uses: the database, file uploads, scheduled jobs, emails, secrets and the domain. Anything missed here becomes an outage later.
Rehearse the data move
Copy the database to the new home, check row counts and spot-check records, then do it again. The live move should be a repeat of something that already worked.
Fix what you find
Migrations often uncover shortcuts, such as permissions checked only in the browser. Fix them during the move, while the code is open.
Switch at a quiet hour, keep a fallback
Move the domain at the quietest time of day and keep the old version untouched for a week. If anything is wrong, switching back takes minutes.
