List repositories from private Docker registry

Summary:
This application is a simple JS client for https://api.nasqueron.org/docker/registry.

Fixes T1460.

Test Plan: Browse https://infra.nasqueron.org/docker/registry/

Reviewers: dereckson

Reviewed By: dereckson

Maniphest Tasks: T1460

Differential Revision: https://devcentral.nasqueron.org/D1909