- remove the old code and its dependencies
- perform some refactoring and fix notifications
- add TODO tags for observed shortcomings
- rename voters.go to users.go
- implement health check for SMTP connection
- drop migration 2022052601_drop_unused_decisions_colums because it was implicitly part of an earlier migration
- add /health endpoint for database health check
- add tests for the health check endpoint
- add tests for middleware secureHeaders, logRequest and tryAuthenticate
- add models.UserModel.CreateUser method
