Default startup arguments so that it will work with the dev setup

[holzeis]

The startup could / should be improved to not require any input for the dev environment. This could be done in the two possible ways.

1. Enhance justfile to derive local ip and add the argument automatically
2. Bind the docker-compose network to the host network so that lnd is able to find the coordinator on localhost.

Originally posted by @holzeis in #201 (comment)

[holzeis]

As option 3, I investigated the to make use of host.docker.internal which gets resolved to the hosts localhost instead of the container localhost.

https://docs.docker.com/desktop/networking/#i-want-to-connect-from-a-container-to-a-service-on-the-host

However, there are several disadvantage to this option.

1. Only works for mac and windows.
2. lnd does support DNS hostnames in node announcements (BOLT 7) - discovery+lnwire: add support for DNS host names in NodeAnnouncement msg lightningnetwork/lnd#6337

[holzeis]

Option 4, we could let the coordinator listen to 0.0.0.0 and add a cli flag to announce the node additionally on the local ip address. Note, announcing the node on 0.0.0.0 will not work.