Full stack fundamentals without the framework churn

A longer course on how web applications actually fit together: requests, responses, databases, authentication and deployment. The value here is not the specific stack it teaches. It is that once you know what a session cookie is and why a database query can be slow, AI-generated code stops being a black box you either accept or reject on vibes. The Odin Project and Full Stack Open are both free and both good. Pick one and finish it.