Migrate Lovable app and advise on infrastructure

I have a Lovable project which is close to launch and I think it will gain decent traction fast.

Currently I am fully linked to the Lovable infrastructure. I would like advice on how I can keep developing in Lovable but solidify the infrastructure. Hopefully to:

Run a production app on my own server
Have a backup of the code ready
Not be vulnerable to Lovable platform issues
Keep data safer
Still be able to edit the app in Lovable and push changes up

Looking for an experienced, fluent English developer. If you are interested in this please give a paragraph outline of what you would suggest for this project (top level to evaluate understanding)