docs: supabase docs

README.md

@@ -29,6 +29,14 @@
     - Note that if you're using VSCode with all the suggested extensions, VSCode should be formatting all your files on save.
 - `npm run gen:types` will generate the types for the database.
 
+### Database management
+
+- `npx supabase start` wil start a local dev database
+- `npx supabase stop` will stop the local dev database (data is persisted unless you do a reset).
+- `npx supabase db push --local` will apply migrations to your local dev database. Useful if someone else has made new SQL migrations.
+- `npx supabase db reset` will completely reset the local dev database.
+- `npx supabase diff db -f <migration-name>` will generate a new migration file based on the current state of the database. This isn't 100% foolproof, so don't use it blindly.
+
 ### What's where?
 
 - `supabase/` contains Supabase configurations and database schemas. See the READMEs in there fore more info.