Sync arc wrapper code with Nasqueron one

Summary:
No-op for the most part, as it's more verbose in comments and header.

Identify the container name as an Arcanist one.

Test Plan: Tested on Dwellers

Reviewers: dereckson

Reviewed By: dereckson

Subscribers: Nasqueron Docker deployment squad

Tags: Docker images

Differential Revision: https://devcentral.nasqueron.org/D2252