Add missing setup command for udev troubleshooting

[MattKobayashi]

I just learned about a command that's required after installing eudev on Alpine Linux to ensure udev updates are triggered on boot. I've added this to the TROUBLESHOOTING_UDEV doc.

[codecov-commenter]

Codecov Report

Merging #350 (fa8f86a) into beta (5cd441d) will decrease coverage by 1.43%.
The diff coverage is 21.93%.

@@            Coverage Diff             @@
##             beta     #350      +/-   ##
==========================================
- Coverage   32.69%   31.25%   -1.44%     
==========================================
  Files          51       54       +3     
  Lines        2753     2979     +226     
  Branches       61       64       +3     
==========================================
+ Hits          900      931      +31     
- Misses       1821     2016     +195     
  Partials       32       32              

Flag	Coverage Δ
unittests	31.25% <21.93%> (-1.44%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
webapp/backend/pkg/config/config.go	0.00% <0.00%> (ø)
...end/pkg/database/scrutiny_repository_migrations.go	0.00% <0.00%> (ø)
...ckend/pkg/database/scrutiny_repository_settings.go	0.00% <0.00%> (ø)
webapp/frontend/src/app/layout/layout.component.ts	2.50% <20.00%> (ø)
...end/src/app/core/config/scrutiny-config.service.ts	42.85% <42.85%> (ø)
...bapp/frontend/src/app/shared/device-status.pipe.ts	64.70% <62.50%> (+54.70%)	⬆️
...mon/dashboard-device/dashboard-device.component.ts	73.07% <80.00%> (+17.52%)	⬆️
webapp/backend/pkg/notify/notify.go	17.66% <100.00%> (ø)
webapp/backend/pkg/web/server.go	50.00% <100.00%> (+2.17%)	⬆️
webapp/frontend/src/app/core/config/app.config.ts	100.00% <100.00%> (ø)
... and 7 more

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[AnalogJ]

Thanks for the update @MattKobayashi!