FITPULSE: A fitness coaching app starter kit for developers

Hey Product Hunt! I built FITPULSE for developers and freelancers who want to create fitness coaching platforms without rebuilding the same features from scratch. It includes workout plans, a workout player with set logging and rest timers, progress history, and a coach dashboard for managing members and assigning plans. One feature I wanted to include from the start: a standalone HTML demo that you can host without setting up a database or Node.js. The full application uses Next.js, TypeScript, PostgreSQL, and Drizzle ORM. You can explore the demo here: https://fitpulse-alpha-eight.ver... I'd love feedback from developers and makers: what would you add first to a fitness coaching starter kit?