usage: java -jar my-ftp-server-*-jar-with-dependencies.jar
[-h] [-P PORT] [-u USER] [-p PASSWORD] -d DIR
simple ftp server
named arguments:
-h, --help show this help message and exit
-P PORT, --port PORT ftp port (default: 21)
-u USER, --user USER username (default: admin)
-p PASSWORD, --password PASSWORD
password (default: admin)
-d DIR, --dir DIR static file dir