Cannot login in deploy preview

[leomotors]

When login in deploy preview, it get redirected back to main https://staging.programming.in.th
Making login impossible

Maybe we need to take use of VERCEL_URL?

[iammarkps]

Please provide an error log. However, I think the problem is OAuth URL.

[leomotors]

Please provide an error log. However, I think the problem is OAuth URL.

Updated description