fix: update MongoDB URI in .env file and add date utility file

server/.env

@@ -1,4 +1,4 @@
-MONGODB_URI=mongodb://mongo_3y6JyM:mongo_iNySJ5@119.8.35.41:27017/license-manager?authSource=admin&retryWrites=true&w=majority&tz=Asia/Shanghai
+MONGODB_URI=mongodb://mongo_3y6JyM:mongo_iNySJ5@119.8.35.41:27017/license-manager?authSource=admin&retryWrites=true&w=majority
 PORT=3000
 ENCRYPTION_KEY=f1e2d3c4b5a6978899aabbccddeeff00112233445566778899aabbccddeeff00
 MAX_USAGE_COUNT=10