[node] Improve readability of the logs in the Node

[snario]

Logging in the Node package is currently not that readable as there has been no effort to discern spammy logs from critical information via any kind of logging level system nor has there been attention to which specifics things ought be logged.

This issue is to holistically look at logging in the Node and try to achieve the following:

• [ ] A logging level system such that someone running the Node can choose which level they would like to log at (e.g., DEBUG, INFO, WARNING, ERROR, etc)
• [ ] At the INFO level, at least, as close to "fully informative" (subjectively defined by @cf19drofxots) as the logs can be for the Node's critical behaviour