feat(docker): 安装 tzdata 并设置 TZ=Asia/Shanghai 以让 Node.js 使用上海时区

backend/Dockerfile

@@ -1,14 +1,13 @@
 FROM node:20-alpine
 
+# Set timezone to Asia/Shanghai FIRST
+# This ensures that any native modules compiled during npm install are linked correctly.
+RUN apk add --no-cache tzdata
+ENV TZ=Asia/Shanghai
+
 WORKDIR /usr/src/app
 
 COPY package*.json ./
-
-# Set timezone to Asia/Shanghai
-RUN apk add --no-cache tzdata
-ENV TZ=Asia/Shanghai
-ENV NODE_ENV=production
-
 RUN npm install
 
 COPY . .
@@ -23,4 +22,4 @@ EXPOSE 25
 # ENV DB_PASSWORD=...
 # ENV DB_NAME=...
 
-CMD [ "node", "app.js" ]
+CMD [ "node", "app.js" ]