feat: add Podman compatibility with non-privileged ports

- Change Docker ports from 80/8000 to 8081/8080 (non-privileged)
- Update CORS_ORIGINS in docker-compose.yml and .env.docker
- Update all documentation (README.md, DOCKER.md) with new ports
- Add Podman compatibility section to CHANGELOG.md
- Enable podman-compose usage without root privileges

.env.docker

@@ -8,8 +8,8 @@ SECRET_KEY=CHANGEZ-MOI-cle-secrete-unique-minimum-32-caracteres-obligatoire
 # Base de données (stockée dans le volume ./data)
 DATABASE_URL=sqlite+aiosqlite:////data/school_management.db
 
-# CORS - Ajustez selon vos domaines
-CORS_ORIGINS=["http://localhost","http://localhost:80","https://votre-domaine.com"]
+# CORS - Ajustez selon vos domaines (ports Docker/Podman: 8080/8081)
+CORS_ORIGINS=["http://localhost:8081","http://localhost:8080","http://localhost:3000","https://votre-domaine.com"]
 
 # Logging
 LOG_LEVEL=INFO