tldr; how2 is a command-line nodejs app. The installation on your Linux system involves installing nodejs and dependencies (duh!). This tutorial shows how to create a snap with snapcraft so that the whole thing is confined and only allows networking to work.
If you are not interested in the tutorial, you try install the snap straight away by running
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[ 1.7 ms ] story [ 10.7 ms ] threadIf you are not interested in the tutorial, you try install the snap straight away by running
snap install how2
and then try it out with
how2 read file while changing
Snaps are supported in several Linux distributions, https://snapcraft.io/