Mention that the IROH_SECRET env var can allow using persistent keys in the readme

[jaymehta-g]

Very useful feature that afaik is only documented in code comments in the source. feels worth mentioning somewhere in the readme

[Fogapod]

It's mentioned in iroh help

For all subcommands, you can specify a secret key using the IROH_SECRET environment variable. If you don't, a random one will be generated.

[matheus23]

Keep in mind the iroh CLI you seem to have installed has been discontinued for ... more than a year at this point I think? And it's technically not related to dumbpipe itself :)

[Fogapod]

Keep in mind the iroh CLI you seem to have installed has been discontinued for ... more than a year at this point I think? And it's technically not related to dumbpipe itself :)

i think i made a typo or i already updated. in any case dumbpipe help mentions it