패키지 버전 업데이트 및 SvelteKit 3, Tailwind CSS 4로 마이그레이션

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Dockerfile

@@ -2,8 +2,8 @@
 FROM node:22-alpine AS base
 WORKDIR /app
 
-RUN npm install -g pnpm@10
-COPY pnpm-lock.yaml .
+RUN npm install -g pnpm@12
+COPY pnpm-lock.yaml pnpm-workspace.yaml ./
 
 # Build Stage
 FROM base AS build