Heroku Deployment

Prerequisites

• You have the InventoryApplication installed locally
• Heroku account
• Heroku CLI installed
• Docker installation

Deployment

1. Make sure Docker is running (i.e. run $ docker ps -a to check this)

If running on MacOS on an M1 chip, make sure to run $ export DOCKER_DEFAULT_PLATFORM=linux/amd64 to prevent an Exec format error from being thrown when deploying to Heroku (Source)

2. Login to the Heroku CLI by running $ heroku login
3. Login to the Heroku Container Registry by running $ heroku container:login and it will return Login Succeeded
4. cd into the InventoryApplication directory
5. On the last line of Dockerfile, replace the contents with the following:

22c22
< CMD gunicorn wsgi:app --bind=$HOST
---
> CMD gunicorn wsgi:app

6. In wsgi.py replace the first line and the last two lines with the following:

1a2
> from os import environ
4c5,6
<     app.run()
---
>     port = int(environ.get("PORT", 5000))
>     app.run(host='0.0.0.0', port=port)

7. Create a file with no extension named Procfile and enter the following:

web: gunicorn wsgi:app 0.0.0.0:$PORT

8. Create a Heroku app by running $ heroku create <app_name>
9. Push the app to Heroku by running $ heroku container:push web --app <app_name>
10. After it is pushed, release it to Heroku by running $ heroku container:release web --app <app_name>
11. Change the Config Vars on heroku by going to <app_name> > Settings > Reveal Config Vars and from there enter your Environment Variables.