Update Dockerfile

Dockerfile

@@ -8,8 +8,8 @@ ARG VITE_API_BASE_URL
 ENV VITE_API_BASE_URL=$VITE_API_BASE_URL
 RUN npm run build
 
-# Stage 2: Serve with nginx (tiny ~50MB vs ~500MB)
-FROM nginx:alpine AS production
+# Stage 2: Serve with nginx
+FROM mirror.gcr.io/library/nginx:alpine AS production
 COPY --from=builder /app/dist /usr/share/nginx/html
 COPY nginx.conf /etc/nginx/conf.d/default.conf
 EXPOSE 80