Log in on staging returns 422 error

[ianheggie-oaf]

Describe the bug

• Sign in https://test.theyvoteforyou.org.au/users/sign_in returns 422 error, possibly because
  • Staging is running as production (eg logging to log/production.log),

To Reproduce

Steps to reproduce the behavior:

1. Browse to https://test.theyvoteforyou.org.au/
2. Click on 'Log in''
3. Enter email and password
4. Click 'Log in' button
5. See error 422

Expected behavior

Site should respond correctly

Screenshots/Output

[51d5c1a9-8a1d-44c2-ba01-97477f48860f] ActionController::InvalidAuthenticityToken (Can't verify CSRF token authenticity.):
[51d5c1a9-8a1d-44c2-ba01-97477f48860f]
[51d5c1a9-8a1d-44c2-ba01-97477f48860f] config/application.rb:30:in 'PlausibleProxy#perform_request'

Additional context

• Found when checking
  • Support ed25519 ssh keys for deployment #1613
    • final check of multiple dependabot PRs
• IP filter list was present only on /etc/nginx/sites-enabled/production, not .../staging.
• /etc/nginx/sites-enabled/{staging,production} does not set RAILS_ENV at all (it should)

[ianheggie-oaf]

Checked database.yml - the databases WHERE as expected (though staging should have staging rather than production as key)