v4.0.0: 회원·덱 API, 인증 UI, 프로필 및 레이아웃 통일

Express/SQLite API와 Docker 구성을 추가하고 로그인·덱 저장·공개 덱·관리자·프로필 화면을 구현했다. 결과 화면 저장 UX, 헤더 프로필, 애드센스용 app-shell 레이아웃(1280px) 및 문서를 반영했다.

Co-authored-by: Cursor <cursoragent@cursor.com>

docker-compose.yml

@@ -0,0 +1,33 @@
+services:
+  uadeck-api:
+    build: ./api
+    container_name: uadeck-api
+    restart: unless-stopped
+    ports:
+      - "${API_PORT:-3000}:3000"
+    environment:
+      - PORT=3000
+      - JWT_SECRET=${JWT_SECRET}
+      - JWT_EXPIRES=${JWT_EXPIRES:-7d}
+      - ADMIN_EMAIL=${ADMIN_EMAIL}
+      - ADMIN_PASSWORD=${ADMIN_PASSWORD}
+      - ADMIN_USERNAME=${ADMIN_USERNAME:-admin}
+      - CORS_ORIGINS=${CORS_ORIGINS:-*}
+      - PREVIEWS_PATH=/data/previews
+      - AVATARS_PATH=/data/avatars
+      - DB_PATH=/data/uadeck.db
+      - DATAS_PATH=/datas
+    volumes:
+      - uadeck-data:/data
+      - ./datas:/datas:ro
+      - ./api/data/previews:/data/previews
+      - ./api/data/avatars:/data/avatars
+    healthcheck:
+      test: ["CMD-SHELL", "node -e \"fetch('http://127.0.0.1:3000/api/v1/health').then(r=>process.exit(r.ok?0:1)).catch(()=>process.exit(1))\""]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 15s
+
+volumes:
+  uadeck-data: