New buildpacks
Add Gemfile.lock
Nginx configuration
Revert "Nginx configuration"

This reverts commit 32a3c036486a4c162b83b65841d4d608e3368a19.
Revert "Add Gemfile.lock"

This reverts commit d48f0f8a340804deeb919737da28f7541de8def3.
Revert "New buildpacks"

This reverts commit addb7a679c39adf3121ab4145eef4673a5c91966.
Adding Gemfile.lock
Heroku public