Fix frontend npm registry in Docker build

Author: zijian-z

frontend/Dockerfile

@@ -3,7 +3,8 @@ FROM node:22-alpine AS build
 WORKDIR /app
 
 COPY package*.json ./
-RUN npm ci
+ARG NPM_REGISTRY=https://registry.npmjs.org/
+RUN npm ci --registry="${NPM_REGISTRY}"
 
 COPY . .
 RUN npm run build