How to Host a Django App on Heroku

a- Add "Procfile"

# add a Profile in the root folder of your project where manage.py exists and add the line below to your Procfile and replace 
#    project_name with your Project name
web: gunicorn project_name.wsgi

b- bash

pip install gunicorn
pip install django-heroku
pip freeze > requirements.txt

# login to your heroku
heroku login

# create new app if one doesn't yet exist
heroku create

# create a new postgres database for your app
heroku addons:create heroku-postgresql:hobby-dev

#connect with your project
heroku git:remote -a Project-name-on-heroku

# before you do this, make sure to add your SECRET_KEY to your env variables in your heroku app settings
git add .
git commit -m "Ready to heroku this sucker in the face."
git push heroku master

# migrate your database to the heroku app. This needs to be in the end to make the migrations for the db
heroku run python manage.py migrate

c- settings.py

#update settings.py file
import django_heroku

# All the way at the bottom of the file
# ...

django_heroku.settings(locals())