Build artifacts are lost from Travis CI's Openshift deployment

I'm trying to deploy an Ember CLI app through Travis CI to Openshift. Unfortunately, the dist folder (which is generated through Travis's before_deploy script), is not getting pushed to Openshift. My travis.yml file:

before_deploy:
- ember build --environment=production
deploy:
  provider: openshift
  . . . .
  skip_cleanup: true

If I do this:

before_deploy:
- ember build --environment=production
- ls

I can see that the dist folder is being generated. However, when I ssh into Openshift, the dist folder is missing (along with other artifacts, like the tmp folder).

Any idea why this is happening? My first guess was that since the Openshift deployment is git-based, the dist folder was being removed because it's in my .gitignore file. However, this behavior persists, even after removing it. My second guess is that I might have to manually git add it during the before_deploy, but that seems like a merge conflict in the making. Plus, I would expect Travis's integration to take care of that already.

So, any ideas? I've been toying with this for hours and still no luck.