Document npm install requirements for alpine linux

[nhooyr]

See #1906 (comment)

[oxy]

Hey - started with a fresh docker container, and ran apk add build-base curl libxkbfile-dev libsecret-dev libx11-dev, but I still get a 500 with a bunch of errors - there seem to be additional dependencies.

See https://gist.github.com/oxy/9e3001beb0dcfcb18fe9651d2520b74d for the log.

[nhooyr]

Does #2479 work @oxy?

[oxy]

Yep, it does! Tested it in a new alpine container via podman run -p 8080:8080 -it alpine.

[nhooyr]

@oxy oo, I didn't know you used podman.

Thoughts on podman vs docker?

[oxy]

Only used podman because it came configured by default on Fedora Silverblue - been migrating from Arch to Fedora this week :p

[nhooyr]

@oxy I've had weird issues with fedora/podman in the past so lmk how it goes!