[FEATURE] Add option to run in isolated environment without `lnd.conf`

[jblachly]

All components of my lightning stack are running in separate VMs (actually LXC containers).

AFAICT, lndg needs RPC info from lnd.conf and admin.macaroon.

Please consider an lndg.conf with just RPC credentials and the name of an arbitrary macaroon (for example, I may wish to use the readonly caveat)

Thank you!

[cryptosharks131]

The only things that lndg needs to run is a valid tls and macaroon file. The settings for lndg are all found inside lndg/settings.py.

In this case, you could bake your own macaroon and rename it to admin.macroon. Then place this and the tls.cert into a folder structure that matches a lnd directory (all subfolders can be empty except for these two files).

Then use the -dir flag of initialize.py or update your settings.py LND_DIR_PATH variable to the isolated directory.

[jblachly]

Awesome, thanks. I'll leave this open and try to make a PR for the documentation.

[cryptosharks131]

Closing as in v1.4.0 you may now specify a custom path to your macaroon and tls files.