supabase-auth.md

Handle Vercel preview and Supabase auth

• SITE_URL = make this your official site URL

• Additional site URLs = should be something like this:

• http://localhost:3000/*/*

• https://*vercel.app/*/*

Then when you do a signIn you can do:

const { user, session, error } = await supabase.auth.signIn({
  provider: 'google'
}, {
  redirectTo: process.env.NEXT_PUBLIC_SITE_URL // set this to your site URL as an env var
})