fix: remove package-lock.json in Docker build to fix rollup musl issue on Alpine

Dockerfile

@@ -2,7 +2,8 @@
 FROM node:20-alpine AS frontend-build
 WORKDIR /app/frontend
 COPY frontend/package*.json ./
-RUN npm install --legacy-peer-deps
+# Remove lock file and reinstall fresh to avoid rollup musl bug on Alpine
+RUN rm -f package-lock.json && npm install --legacy-peer-deps
 COPY frontend/ ./
 RUN npm run build