For TrueNas Scale and other Docker installations - Apply fix to the host system

[bobatgit]

Suggest adding a paragraph to clarify/inform folks to apply the fix to the host system when running Syncthing in a Docker container. It took me hours to figure this out. I'm running it as an App on TrueNas Scale 22.12.3.3 (so, Ubuntu with Kubernetes under the hood).

Suggest adding On Docker images or a TrueNas Scale App you should rung the above lines on the host system, not the Docker container in question. after this line:

docs/users/faq-parts/usage.rst

Line 266 in 8fdf832

echo 204800 | sudo tee /proc/sys/fs/inotify/max_user_watches

Sources: https://gist.github.com/tsrivishnu/9f551ef0098021a913e01d6d594c555d