Merge deploy-terraform into dev-dhi-next

[benloh]

This adds support for the CI/CD workflow to the main dev-dhi-next branch in preparation for future iterations of the deploy-terraform branch. Deploying droplets using terraform/ansible should generally either use the current deploy-terraform branch (which is guaranteed to be runnable via CI/CD) or a tagged commit (e.g. if deploying a specific commit point for a pilot study).

The updates are basically what is defined in #404.

Specifcally:

• Redirecting SSL traffic for websockets (affecting both nc-multiplex and netcreate-itest)
• Adding an init script that creates a dummy netcreate-config.js file so that npm run package can be run during provisioning on a fresh droplet install.