배포 모드 전환: 프로덕션 Dockerfile + docker-compose 재구성

- frontend/Dockerfile: 멀티스테이지 (node 빌드 → serve로 dist 정적 서빙).
  포트 5173은 그대로 유지해서 Caddy 설정 변경 불필요
- backend/Dockerfile: npm ci --omit=dev + npm start (node --watch 제거)
- docker-compose.yml: volumes/모듈 마운트 제거, build 기반으로 변경,
  restart: unless-stopped, NODE_ENV=production 추가
- .dockerignore 양쪽 추가해서 이미지에 node_modules/.git 제외

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

backend/.dockerignore

@@ -0,0 +1,3 @@
+node_modules
+.git
+*.log

backend/Dockerfile

@@ -0,0 +1,7 @@
+FROM node:22-alpine
+WORKDIR /app
+COPY package*.json ./
+RUN npm ci --omit=dev
+COPY . .
+EXPOSE 3000
+CMD ["npm", "start"]

docker-compose.yml

@@ -1,36 +1,26 @@
 services:
   frontend:
+    build: ./frontend
     container_name: maplestory-frontend
-    image: node:22-alpine
-    working_dir: /app
-    volumes:
-      - ./frontend:/app
-      - frontend_modules:/app/node_modules
-    command: sh -c "npm install --legacy-peer-deps && npm run dev"
     labels:
       - "com.centurylinklabs.watchtower.enable=false"
     networks:
       - caddy
+    restart: unless-stopped
 
   backend:
+    build: ./backend
     container_name: maplestory-backend
-    image: node:22-alpine
-    working_dir: /app
-    volumes:
-      - ./backend:/app
-      - backend_modules:/app/node_modules
-    command: sh -c "npm install && npm run dev"
     env_file: .env
+    environment:
+      - NODE_ENV=production
     labels:
       - "com.centurylinklabs.watchtower.enable=false"
     networks:
       - caddy
       - db
       - app
-
-volumes:
-  frontend_modules:
-  backend_modules:
+    restart: unless-stopped
 
 networks:
   caddy:

frontend/.dockerignore

@@ -0,0 +1,4 @@
+node_modules
+dist
+.git
+*.log

frontend/Dockerfile

@@ -0,0 +1,15 @@
+# 빌드 단계
+FROM node:22-alpine AS builder
+WORKDIR /app
+COPY package*.json ./
+RUN npm ci --include=dev --legacy-peer-deps
+COPY . .
+RUN npm run build
+
+# 정적 파일 서빙 단계
+FROM node:22-alpine
+WORKDIR /app
+RUN npm install -g serve
+COPY --from=builder /app/dist ./dist
+EXPOSE 5173
+CMD ["serve", "-s", "dist", "-l", "5173"]