Use plugins in a Heroku deployment

@vitaum88 No, I would recommend that you select another service, perhaps Elastic Beanstalk:
Installing plugins (Oracle driver) on an AWS EB instance
Or just a simple Docker setup.
Or import the CSV into a database, which Metabase supports, see comments here: https://github.com/metabase/metabase/issues csv impo

It's on the roadmap to have CSV integrated into Metabase. I don't know the implementation details yet.
https://www.metabase.com/roadmap/