Updates

On host/Node.js.md

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+### Download Node.js®
+
+'''
+# Download and install nvm:
+curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.3/install.sh | bash
+
+# in lieu of restarting the shell
+\. "$HOME/.nvm/nvm.sh"
+
+# Download and install Node.js:
+nvm install 22
+
+# Verify the Node.js version:
+node -v # Should print "v22.19.0".
+nvm current # Should print "v22.19.0".
+
+# Verify npm version:
+npm -v # Should print "10.9.3".
+'''