diff --git a/docker-compose.yml b/docker-compose.yml
index f3af36b..9be40eb 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,91 +1,85 @@
+version: '3.8'
+
 services:
-  postgres:
-    image: postgres:15-alpine
-    environment:
-      POSTGRES_DB: ${POSTGRES_DB:-linkforty}
-      POSTGRES_USER: ${POSTGRES_USER:-linkforty}
-      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-changeme}
-    volumes:
-      - postgres_data:/var/lib/postgresql/data
+  # --- Reverse Proxy (Nginx) ---
+  nginx:
+    image: nginx:alpine
+    container_name: linkforty-nginx
+    restart: always
     ports:
-      - "${POSTGRES_PORT:-5432}:5432"
-    healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER:-linkforty}"]
-      interval: 5s
-      timeout: 5s
-      retries: 5
-    restart: unless-stopped
-
-  redis:
-    image: redis:7-alpine
-    command: redis-server --appendonly yes
-    ports:
-      - "${REDIS_PORT:-6379}:6379"
+      - "80:80"
+      - "443:443"
     volumes:
-      - redis_data:/data
-    healthcheck:
-      test: ["CMD", "redis-cli", "ping"]
-      interval: 5s
-      timeout: 5s
-      retries: 5
-    restart: unless-stopped
-
-  linkforty:
-    # Use published image (recommended for production)
-    image: linkforty/core:latest
-
-    # OR build from source (for development)
-    # Uncomment the lines below and comment out the 'image:' line above
-    # build:
-    #   context: .
-    #   dockerfile: Dockerfile
-
+      - ./nginx/conf.d:/etc/nginx/conf.d
+      - ./certbot/conf:/etc/letsencrypt
+      - ./certbot/www:/var/www/certbot
+      - ./nginx/well-known:/etc/nginx/well-known:ro
     depends_on:
-      postgres:
-        condition: service_healthy
-      redis:
-        condition: service_healthy
+      - linkforty-prod
+      - linkforty-sandbox
+
+  # ==========================================
+  # 1. 운영 (Prod) 환경
+  # ==========================================
+  postgres-prod:
+    image: postgres:15-alpine
+    container_name: linkforty-db-prod
+    restart: always
     environment:
-      # Database configuration
-      DATABASE_URL: postgresql://${POSTGRES_USER:-linkforty}:${POSTGRES_PASSWORD:-changeme}@postgres:5432/${POSTGRES_DB:-linkforty}?sslmode=disable
+      POSTGRES_USER: linkforty
+      POSTGRES_PASSWORD: secret_password_prod
+      POSTGRES_DB: linkforty_prod
+    volumes:
+      - pgdata_prod:/var/lib/postgresql/data
 
-      # Redis configuration
-      REDIS_URL: redis://redis:6379
+  redis-prod:
+    image: redis:7-alpine
+    container_name: linkforty-redis-prod
+    restart: always
 
-      # Server configuration
-      NODE_ENV: ${NODE_ENV:-production}
-      PORT: ${PORT:-3000}
-      HOST: ${HOST:-0.0.0.0}
+  linkforty-prod:
+    image: linkforty-custom:latest
+    container_name: linkforty-core-prod
+    restart: always
+    environment:
+      - DATABASE_URL=postgresql://linkforty:secret_password_prod@postgres-prod:5432/linkforty_prod?sslmode=disable
+      - REDIS_URL=redis://redis-prod:6379
+      - PORT=3000
+    depends_on:
+      - postgres-prod
+      - redis-prod
 
-      # Optional: JWT secret for authentication
-      # JWT_SECRET: ${JWT_SECRET}
+  # ==========================================
+  # 2. 개발 (Sandbox) 환경
+  # ==========================================
+  postgres-sandbox:
+    image: postgres:15-alpine
+    container_name: linkforty-db-sandbox
+    restart: always
+    environment:
+      POSTGRES_USER: linkforty
+      POSTGRES_PASSWORD: secret_password_sandbox
+      POSTGRES_DB: linkforty_sandbox
+    volumes:
+      - pgdata_sandbox:/var/lib/postgresql/data
 
-      # Optional: Email configuration
-      # SMTP_HOST: ${SMTP_HOST}
-      # SMTP_PORT: ${SMTP_PORT}
-      # SMTP_USER: ${SMTP_USER}
-      # SMTP_PASS: ${SMTP_PASS}
-      # EMAIL_FROM: ${EMAIL_FROM}
+  redis-sandbox:
+    image: redis:7-alpine
+    container_name: linkforty-redis-sandbox
+    restart: always
 
-    ports:
-      - "${LINKFORTY_PORT:-3000}:3000"
-    restart: unless-stopped
-
-    # Health check (optional, uncomment if needed)
-    # healthcheck:
-    #   test: ["CMD", "wget", "--quiet", "--tries=1", "--spider", "http://localhost:3000/health"]
-    #   interval: 30s
-    #   timeout: 10s
-    #   retries: 3
-    #   start_period: 40s
+  linkforty-sandbox:
+    image: linkforty-custom:latest
+    container_name: linkforty-core-sandbox
+    restart: always
+    environment:
+      - DATABASE_URL=postgresql://linkforty:secret_password_sandbox@postgres-sandbox:5432/linkforty_sandbox?sslmode=disable
+      - REDIS_URL=redis://redis-sandbox:6379
+      - PORT=3001
+    depends_on:
+      - postgres-sandbox
+      - redis-sandbox
 
 volumes:
-  postgres_data:
-    driver: local
-  redis_data:
-    driver: local
-
-# Optional: Add network configuration for isolation
-# networks:
-#   linkforty:
-#     driver: bridge
+  pgdata_prod:
+  pgdata_sandbox: