Setup phone provider with twilio

[chatch]

Here is how it is setup in managed supabase:
https://supabase.com/dashboard/project/pqlwxerasppsyleweruk/auth/providers?provider=Phone

Looks like 3 twilio settings map on to 3 env variables here as well as the GOTRUE_SMS_PROVIDER="twilio":
https://github.com/supabase/auth/blob/86b7de45c9432ea6ee9bd7c7e9cfe96e038fe2bc/example.env#L192

Test OTP settings on to these variables:
https://github.com/supabase/auth/blob/86b7de45c9432ea6ee9bd7c7e9cfe96e038fe2bc/example.env#L243

So adding those 6 variables into:

• fly toml https://github.com/cepro/supabase-host/blob/main/fly/auth/fly-auth-mgf.toml#L13
• and fly secrets

should setup the phone provider I think.