Drab on heroku about drab

[grych]

It must be similar to #37 (:code.priv_dir())

[peterfication]

Ok my problem was that I didn't commit my ·/priv/hashes_expressions.drab.cache.prod because I thought I shouldn't commit cache files. Now it works :)

Thanks @grych, the linked issue helped me to find this out.

[grych]

It was OK. You shouldn't commit it.
The file should be creating during the compilation on heroku. Re-opening the issue to investigate.