Document how ASSET_HOST affects the addon
Document how ASSET_HOST affects the addon

`ASSET_HOST`
------------

Used by [the addon] during finerprinting.

When compiling an Ember app named `"frontend"` from within Rails,
[the addon] will prepend the generated asset paths with:

    ${ASSET_HOST}/assets/frontend/

[the addon]: https://github.com/rondale-sc/ember-cli-rails-addon/

`CDN_HOST`
------------

Behaves the same way as `ASSET_HOST`, acting as a fallback.

weggesser/ember-cli-rails,weggesser/ember-cli-rails,weggesser/ember-cli-rails,thoughtbot/ember-cli-rails,rwz/ember-cli-rails,seanpdoyle/ember-cli-rails,thoughtbot/ember-cli-rails,koryteg/glimmer-rails,rwz/ember-cli-rails,seanpdoyle/ember-cli-rails,rwz/ember-cli-rails,thoughtbot/ember-cli-rails,koryteg/glimmer-rails,seanpdoyle/ember-cli-rails,koryteg/glimmer-rails