Update application and database port configurations

Adjusted Docker configuration, exposing PostgreSQL on port 4523 and the application on internal port 5555, with Nginx proxying requests to the application. Updated Dockerfile, docker-compose.yml, and DOCKER.md accordingly.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ae4037a0-2a6f-4530-9bac-79b543286bda
Replit-Commit-Checkpoint-Type: full_checkpoint
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docker-compose.yml

@@ -6,6 +6,8 @@ services:
     image: postgres:16-alpine
     container_name: socialflow-db
     restart: unless-stopped
+    ports:
+      - "4523:5432"
     environment:
       POSTGRES_DB: ${PGDATABASE:-socialflow}
       POSTGRES_USER: ${PGUSER:-socialflow}
@@ -15,10 +17,6 @@ services:
     networks:
       - internal
       - nginx_default
-    # Port non exposé sur l'hôte pour plus de sécurité en production
-    # Décommentez la ligne suivante si vous avez besoin d'accéder à la DB localement
-    # ports:
-    #   - "${PGPORT:-5432}:5432"
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -U ${PGUSER:-socialflow}"]
       interval: 10s
@@ -32,15 +30,13 @@ services:
       dockerfile: Dockerfile
     container_name: socialflow-app
     restart: unless-stopped
-    ports:
-      - "4523:4523"
     environment:
       NODE_ENV: production
-      PORT: 4523
+      PORT: 5555
       DATABASE_URL: postgresql://${PGUSER:-socialflow}:${PGPASSWORD:-changeme}@postgres:5432/${PGDATABASE:-socialflow}
       OPENROUTER_API_KEY: ${OPENROUTER_API_KEY}
       SESSION_SECRET: ${SESSION_SECRET:-your-secret-key-change-me}
-      APP_URL: ${APP_URL:-http://localhost:4523}
+      APP_URL: ${APP_URL:-http://localhost:5555}
     networks:
       - internal
       - nginx_default