stack-auth/stack: Open-source Clerk/Auth0 alternative

Stack Auth is an open-source, developer-friendly user authentication solution that supports Next.js frontends and backend integrations via REST API. It offers a quick setup and the flexibility to export and self-host user data at any time. The post provides comprehensive setup instructions including dependency installation through Docker, local development execution, and Prisma database initialization. Contributors are encouraged to join their Discord and follow contribution guidelines.