You can install either the Beta or Stable repo.

Beta - Frequent releases but may be unstable, contains all the latest changes and fixes.

Stable - Less frequent releases but should be more stable and prone to breaking changes.

Two install options

One - Direct download and install

With this approach you download the repo zip and install it directly.

Two - Side load from HTTP source

With this approach you need to add a HTTP source that points to this address and then use that source to install the repo.

First setup the HTTP source

Protocol:Web server directory (HTTP)