Day 1: Schema & Environment — Building a Production-Grade Webhook Gateway

Building a high-performance, stateless Webhook Gateway from scratch using Java 25, Spring Boot 4, and PostgreSQL 18. Day 1 Covered: -Project initialization and stack setup -Custom user authentication architecture -Writing production-grade Flyway database migrations Tech Stack: Java 25 | Spring Boot 4 | PostgreSQL 18 | Hibernate 7 | Docker | Lombok