Prepare application for deployment using Docker containers

Adds Dockerfile, docker-compose.yml, .dockerignore, nginx.conf, init.sql and updates replit.md and server/routes.ts.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 91318273-c764-4fd4-be04-bdc12c38af32
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/0715008c-7244-40f4-befc-26c014852236/c3a86207-4ee0-47f9-8062-2dbbae696290.jpg

docker-compose.yml

@@ -0,0 +1,76 @@
+version: '3.8'
+
+services:
+  # Base de données PostgreSQL
+  postgres:
+    image: postgres:15-alpine
+    container_name: regisflow-db
+    environment:
+      POSTGRES_DB: regisflow
+      POSTGRES_USER: regisflow
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-regisflow2024}
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+      - ./init.sql:/docker-entrypoint-initdb.d/init.sql:ro
+    ports:
+      - "5432:5432"
+    networks:
+      - regisflow-network
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U regisflow -d regisflow"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
+  # Application RegisFlow
+  regisflow:
+    build: .
+    container_name: regisflow-app
+    depends_on:
+      postgres:
+        condition: service_healthy
+    environment:
+      NODE_ENV: production
+      PORT: 5000
+      DATABASE_URL: postgresql://regisflow:${POSTGRES_PASSWORD:-regisflow2024}@postgres:5432/regisflow
+      SESSION_SECRET: ${SESSION_SECRET:-your-super-secret-session-key-change-in-production}
+      TZ: Europe/Paris
+    volumes:
+      - backup_data:/app/backups
+    ports:
+      - "5000:5000"
+    networks:
+      - regisflow-network
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD-SHELL", "wget --no-verbose --tries=1 --spider http://localhost:5000/health || exit 1"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 60s
+
+  # Nginx reverse proxy (optionnel)
+  nginx:
+    image: nginx:alpine
+    container_name: regisflow-nginx
+    depends_on:
+      - regisflow
+    volumes:
+      - ./nginx.conf:/etc/nginx/nginx.conf:ro
+    ports:
+      - "80:80"
+      - "443:443"
+    networks:
+      - regisflow-network
+    restart: unless-stopped
+
+volumes:
+  postgres_data:
+    driver: local
+  backup_data:
+    driver: local
+
+networks:
+  regisflow-network:
+    driver: bridge