Add Umbrel

[mariopaolo]

Umbrel is a one-stop solution to run Bitcoin and Lightning, both nodes and wallets, and other goodies

From their website https://getumbrel.com/

Run your personal Bitcoin and Lightning Network node, self-host open source apps, cut out the middlemen, and use Bitcoin to its full potential. For free.

maybe @lukechilds from https://github.com/getumbrel could chime in on this.

[stavros-k]

Closed as this is succeeded by #729

[Ornias1993]

Having looked into this request personally:

Umbrel is not a docker container that can be run on other platforms.
And even if it is, it's most certainly not kubernetes native or SCALE compatible.

Hence removing it from the list.

[truecharts-admin]

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