DNS for SwarmAddresses and BootstrapAddresses

[rossjones]

Currently in configuration, we use IP addresses for SwarmAddresses and also for BootstrapAddresses.

These looks like

#SwarmAddress
/ip4/35.245.115.191/tcp/4001/p2p/12D3KooWE4wfAknWtY9mQ4eAA8zrFGeZa7X2Kh4nBP2tZgDSt7Rh

# BootstrapAddress
/ip4/35.245.115.191/tcp/1235/p2p/QmdZQ7ZbhnvWY1J12XYKGHApJ6aufKyLNSvf8jZBrBaAVL

This is problematic in cases where the IP address of these computers changes.

MultiAddr supports dns and so we could use something more like the following:

# SwarmAddress
/dns4/node1.production.bacalhau.org/tcp/4001/p2p/12D3KooWE4wfAknWtY9mQ4eAA8zrFGeZa7X2Kh4nBP2tZgDSt7Rh

# BoostrapAddress 
/dns4/node0.production.bacalhau.org/tcp/1234/http 

[wdbaruni]

I don't think this is valid anymore. We are moving away from allowing other nodes from joining our demo network, and moving away from libp2p as our default transport layer