missing "database" folder

[Sorath93]

$ cd django-bootstrap-modal-forms
$ pip install -r requirements.txt
$ python manage.py migrate
$ python manage.py runserver

When following the below instructions in the documentation I was getting the error "sqlite3.OperationalError: unable to open the database file" until I created a folder called "database" in the BASE_DIR. I was stuck on this error for a while, so it may be worth adding a note into the instructions to do this.