How to deploy to the Heroku

Register on Heroku if you are not registered (https://signup.heroku.com/)
Install Heroku CLI (https://devcenter.heroku.com/articles/heroku-cli)
Login to Heroku terminal by heroku login
Create heroku app by heroku create or heroku create <app_name> for custom name of the application
Run heroku git:remote -a <app_name>
Open settings.py file and modify ALLOWED_HOSTS by adding <app_name.herokuapp.com>
Commit changes by git commit -m <commit_message>
Create PostgreSQL database on Heroku by heroku addons:create heroku-postgresql:hobby-dev
Go to https://dashboard.heroku.com/apps/<app_name>/settings and click on the Reveal Config Vars and copy the DATABASE URL. It has the following structure: postgres://<DB_USER>:<DB_PASSWORD>@<DB_HOST>:<DB_PORT>/<DB_NAME>
Set these variables as Heroku environment variables below DATABASE_URL with the keys DB_USER, DB_PASSWORD, DB_HOST, DB_PORT, DB_NAME and the values retrieved from the DATABASE_URL
Add the SECRET_KEY environment variable and set it to some value
Add the DISABLE_COLLECTSTATIC environment variable and set it to 1
Add the HEROKU environment variable and set it to 1
if you are on a main branch then run git push heroku main, otherwise run git push heroku <branch_name>:main

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