Introduces Reality负载均衡 (load balancing) support with new configuration options and logic in install.sh and file_manager.sh. Refactors server file creation to support default ports, adds helper for file_manager.sh download, and updates Nginx upstream configuration to include .realityServers files. Also improves customization prompts for shortIds and keys, and updates version numbers.
Update install.sh
Update version and fix realityServers file creation
Bumped script version to 1.2.1. Changed realityServers file creation to no longer pass port '9443', ensuring consistent behavior with other server types.
yunshu