Log output and errors from `node.js` server
Log output and errors from `node.js` server

We want to be able to see console logs and errors from the node.js
server, which is started when the webpack build is done.

This commit sets the `stdout` and `stderr` of the child process[1]
spawned in `StartServerAfterBuild` to inherit from the parent.

[1] https://nodejs.org/api/child_process.html#optionsstdio

uktrade/data-hub-frontend,uktrade/data-hub-frontend,uktrade/data-hub-fe-beta2,uktrade/data-hub-fe-beta2,uktrade/data-hub-frontend