List

call the site with your parameters
- add node: https://goldkarpfen.eclabs.de/?add_node=1234567890123456789012345678901234567890&nick=xyz
- check node: https://goldkarpfen.eclabs.de/?check_node=1234567890123456789012345678901234567890"
- list nodes: https://goldkarpfen.eclabs.de/?list