refactor(docker): 优化Dockerfile中的用户和组创建命令

使用更简洁的useradd和addgroup命令替代原有写法，保持功能不变但提高可读性

docker/ppanel-user-web/Dockerfile

@@ -5,8 +5,8 @@ FROM oven/bun:latest AS base
 WORKDIR /app
 
 # Create non-root user and set permissions
-RUN addgroup --system --gid 1001 nodejs \
-    && adduser --system --uid 1001 nextjs
+RUN addgroup -r -g 1001 nodejs && \
+    useradd -r -u 1001 -g nodejs -d /home/nextjs -m nextjs
 
 # Copy build output and static files
 COPY ./apps/user/.next/standalone ./
@@ -22,4 +22,4 @@ USER nextjs
 ENV NEXT_TELEMETRY_DISABLED=1
 
 # Default command to start the server
-CMD ["bun", "apps/user/server.js"]
+CMD ["bun", "apps/user/server.js"]