feat(server): 添加静态文件服务支持更新目录

添加对更新目录的静态文件服务支持，通过express.static中间件提供'/updates'路由访问

server.js

@@ -1,6 +1,7 @@
 require('dotenv').config()
 const express = require('express')
 const cors = require('cors')
+const path = require('path')
 const { MongoClient, ObjectId } = require('mongodb')
 const { createAuthRoutes } = require('./routes/auth')
 
@@ -8,9 +9,11 @@ const app = express()
 const PORT = process.env.PORT || 3001
 const MONGO_URL = process.env.MONGO_URL || 'mongodb://localhost:27017'
 const DB_NAME = process.env.DB_NAME || 'skills_market'
+const UPDATES_DIR = process.env.UPDATES_DIR || 'C:\\apps\\skills-market-server\\updates'
 
 app.use(cors())
 app.use(express.json({ limit: '50mb' }))
+app.use('/updates', express.static(UPDATES_DIR))
 
 let db
 let skillsCollection