Node: use `npm ci` to install dependencies on CI

npm 5.8 introduced a `ci` command designed to install dependencies on continuous integration environment. It's much faster, reliable and secure as it ensures `package-lock.json` matches with `package.json`.

Let's see how we can use this command instead of `npm install` in this context.

The issue names no files; start by locating the CI configuration and the current npm install command. Check how package.json and package-lock.json are used there, then run the CI checks to confirm the dependency installation succeeds with npm ci.

Written by the indexing model from the issue text.