Website Full Self-Hosting and Login/Signup Customization

Full self-hosting is important, Currently the backend (database, authentication, backend functions) is managed by Base44's infrastructure and cannot be self-hosted, if you guys could back it possible for we the user to self host when needed. You should also allow user to be able to edit/customize the login page instead of using the in built login page which does not look attractive and suitable to the them of the website we build