Good day.
Please clarify what do you exactly mean:
1. Use Web SDK as node.js package to implement client part. Now, there is no NPM WebSDK package, we're still working on it in ticker WCS-1286. You can download Web SDK source code from
GitHub and prepare your custom package if you need.
2. Server functions implementation using node.js only. This is impossible. Please read WCS
requirements and prerequisites to install.