Hello @Christiantav, which section of the curriculum are you following Is this for the Installfest, the Intro to Rails, or some other curriculum?
I don't know for sure what the issue is. It doesn't look like there was any error when running the migration. The output is debug information specific to the Postgres database Heroku uses.
If I had to take a shot in the dark, it looks like the database migration files may not have been committed before pushing your application to Heroku. What is the output when you run the command
in your rails application directory?