docs: add instructions to get pw from environment variable

pimutils / vdirsyncer

📇 Synchronize calendars and contacts.

https://vdirsyncer.pimutils.org/

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Closed azrdev closed 7 months ago

azrdev commented 7 months ago

tested with vdirsyncer 0.19.2 on archlinux

WhyNotHugo commented 7 months ago

I had no idea about the printenv command, thanks for the hint.