build: use mainland package mirrors

Dockerfile

@@ -1,17 +1,23 @@
 FROM node:24-alpine@sha256:d32cdf619f63fe0471182d08996dd516c6275bb5fd31ae06e55a570bd9e1ad43 AS build
 
+ARG NPM_REGISTRY=https://registry.npmmirror.com
+ENV COREPACK_NPM_REGISTRY=${NPM_REGISTRY}
+ENV npm_config_registry=${NPM_REGISTRY}
+
 WORKDIR /app
 RUN corepack enable
 
 COPY package.json pnpm-lock.yaml pnpm-workspace.yaml ./
-RUN pnpm install --frozen-lockfile
+RUN pnpm install --frozen-lockfile --registry="${NPM_REGISTRY}"
 
 COPY . .
 RUN pnpm build
 
 FROM caddy:2.10.2-alpine@sha256:4c6e91c6ed0e2fa03efd5b44747b625fec79bc9cd06ac5235a779726618e530d
 
-RUN apk add --no-cache jq nodejs
+ARG ALPINE_MIRROR=mirrors.aliyun.com
+RUN sed -i "s|dl-cdn.alpinelinux.org|${ALPINE_MIRROR}|g" /etc/apk/repositories && \
+    apk add --no-cache jq nodejs
 COPY Caddyfile /etc/caddy/Caddyfile
 COPY docker-entrypoint.sh /usr/local/bin/tjwater-frontend-entrypoint
 COPY --from=build /app/dist /srv