Deploy Authorizer on Railway` is an open-source authentication and authorization solution that provides a self-hosted alternative to Auth0. The solution comes with easy-to-integrate frontend SDKs and allows users to bring their own database. Railway offers a free one-click deploy for Authorizer, which is maintained by its creator Lakhan Samani, along with automatically provisioned PostgreSQL and Redis databases. To deploy the solution, users can click a button on Railway's platform and follow a simple guide, providing features such as email and password-based accounts, social logins, secure session management, role-based access management, and more. The deployment process involves creating a repository in the user's GitHub account and filling in required environment variables before hitting the deploy button to launch their new project with an Authorizer instance deployed in a few minutes. Additionally, users can integrate Authorizer into their React frontend applications using a provided hook and component.