The answer
No. Update settings that actually depend on the hostname. A database password normally changes for credential rotation or a service change, not for domain branding.
Why must application environment variables be updated after changing domains?
Must a MongoDB password change whenever the application gets a custom domain?
More FAQs in Why must application environment variables be updated after changing domains?
The application may generate links from an unchanged public base URL or an older deployment's configuration. Trace that setting and deploy the corrected production values.
No. Identity-provider callbacks, storage CORS policies, hosting redirects, and email-domain configuration can live in separate services. Review each integration that uses the public hostname.
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