Update `Ceramic via Git` for latest changes

[MSGhero]

Couple out-of-date items I've noticed in updating Ceramic

• Node 14.19.1 is not strictly required. I'm on ~latest with no issues
• node isn't included anymore, so Installation script should be changed (not sure exactly how)
• Update script should be changed to reflect user's own node, should call node tools/install

I can make a PR, but need @jeremyfa to review how Installation script should change. Maybe it's node tools/install before ceramic link, and then removing cd node; npm ci?