🔧 chore(__main__.py): refactor serve function to use environment variables for configuration options

🌟 feat(__main__.py): add support for environment variables to configure serve function
The serve function in __main__.py has been refactored to use environment variables for configuration options. The following configuration options now support environment variables: host, workers, port, log_level, log_file, path, open_browser, and remove_api_keys. This change allows for greater flexibility and easier configuration of the serve function by using environment variables instead of command line options.