Basics Backend Explained Web Pages VS Web Applications Backend technologies JSON APIs Why APIs APIs Server-side API Requests + Axios API Authentication REST API Tools Node.js nodemon Express.js HTTP Fundamentals HTTP requests in Express Express middleware (bodyParser, Morgan) Custom middleware Next.js Database SQL vs NoSQL MongoDB (NoSQL) PostgreSQL (can also be SQL) MySQL (SQL) API Trends Microservice Architecture (MSA) Serverless Architectures & APIs Supabase Firebase