Implement the public-ip crate to get the proper IP for the Cluster Server.

[Makosai]

https://github.com/avitex/rust-public-ip needs to be used to improve this code:

let ip = "127.0.0.1".as_bytes(); // TODO: Use public_ip to get an actual IP.

Importing the crate would be simple. But I'm wondering if there's a more efficient solution. The solution doesn't really matter since it's only done once. If someone wants to implement this feel free to choose either route. It should be a quick ~5 line update with the public_ip crate going in the cluster crate and the version coming from the Workspace.

• Add public_ip to cluster crate.
• Store the version in the Workspace.
• Replace ip with public_ip value.