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

DOCKER.md

@@ -27,9 +27,11 @@ docker-compose up -d
 ```
 
 **Accès :**
-- Frontend : http://localhost
-- API : http://localhost:8000
-- Documentation API : http://localhost:8000/api/v2/docs
+- Frontend : http://localhost:8081
+- API : http://localhost:8080
+- Documentation API : http://localhost:8080/api/v2/docs
+
+> 💡 **Compatibilité Podman** : Les ports 8080/8081 (>1024) permettent l'utilisation sans privilèges root
 
 ---
 
@@ -186,10 +188,10 @@ Les services incluent des healthchecks automatiques :
 
 ```bash
 # Vérifier la santé du backend
-curl http://localhost:8000/api/v2/health
+curl http://localhost:8080/api/v2/health
 
 # Vérifier la santé du frontend
-curl http://localhost/
+curl http://localhost:8081/
 
 # Voir le statut Docker
 docker-compose ps
@@ -268,7 +270,7 @@ server {
     server_name notytex.example.com;
 
     location / {
-        proxy_pass http://localhost:80;
+        proxy_pass http://localhost:8081;
         proxy_set_header Host $host;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;