If CODER_OIDC_EMAIL_DOMAIN is configured with an '@' symbol (e.g. CODER_OIDC_EMAIL_DOMAIN=@example.com), then OIDC logins will fail with the message

`Your email "user@example.com" is not in domains ["@example.com"]!

Potentially related to 4439a92

Workaround: remove the '@' symbol.