Add to Unraid Community Apps

To make Movary easy to setup for Unraid users we should add Movary to the [Unraid Community Apps](https://unraid.net/community/apps).

Notes:
- Community Apps Repo Addition Request: [here](https://form.asana.com/?k=qtIUrf5ydiXvXzPI57BiJw&d=714739274360802)
- How to create docker template: [here](https://forums.unraid.net/topic/57181-docker-faq/#comment-566084)