TKE-45: add TKE node maintenance doc#50

wenjiehs wants to merge 1 commit into

tke-workshop:maintke-workshop/tke-workshop.github.io:mainfrom

wenjiehs:agent/tke-workshop-doc-change-agent/cfbacacbwenjiehs/tke-workshop.github.io:agent/tke-workshop-doc-change-agent/cfbacacbCopy head branch name to clipboard