fix(ci): use reachable pnpm registry for Docker builds

Dockerfile

@@ -6,10 +6,13 @@ ENV PNPM_HOME=/pnpm
 ENV PNPM_STORE_PATH=/pnpm/store
 ENV PATH=$PNPM_HOME:$PATH
 
+ARG NPM_REGISTRY=https://registry.npmmirror.com
+
 RUN apk add --no-cache libc6-compat \
   && corepack enable \
   && corepack prepare pnpm@10.30.3 --activate \
-  && pnpm config set store-dir "$PNPM_STORE_PATH"
+  && pnpm config set store-dir "$PNPM_STORE_PATH" \
+  && pnpm config set registry "$NPM_REGISTRY"
 
 FROM base AS deps
 COPY package.json pnpm-lock.yaml pnpm-workspace.yaml ./