* chore: add lnd dir option to config (#92)
* Add lndDir and network options in AccountType
* Add BITCOIN_NETWORK environment variable
We use this as a fallback value if no network values are set for the
individual accounts.
* Update documentation
We update the documentation to cover the new LND directory and Bitcoin
network configuration parameters.
* chore: 🔧 cleanup
* docs: 📚️ cleanup
Co-authored-by: Torkel Rogstad <torkel@rogstad.io>
