Chore/update with supabase demo deploy button (#52483)
### What?
- added correct deploy button urls
- uses new supabase integration
- updated readme for local development, more clearer instructions
- added opengraph image
### Why?
- old supabase integration is buggy
- readme is more clear for local development
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Co-authored-by: Steven Tey <stevensteel97@gmail.com>
Co-authored-by: JJ Kasper <jj@jjsweb.site>
