How To Deploy A python-flask app to Heroku. Avoid the [H10-Error] !

Deploying a flask app to Heroku can somehow become a hustle! Even when you have done everything the right way,the famous H10 Heroku error can just pop up out of nowhere!

Here is a way that makes deployment less of a hustle and more of a win!

1. - Navigate to your config file,config.py, ensure that the DEBUG = True is in the same line as class DevConfig(Config):

 class DevConfig(Config):

 DEBUG = True

1. Create a Procfile, then add: < web: gunicorn manage:app> In this case, app is your application name and manage is the file you're using to run the code

2. Login to your Heroku account or create a new one:< heroku login >

3. Next create the app: heroku create <name-of-app>

4. If you have API or secret key>> heroku config:set API_KEY= <your-api-key>

5. Install the following(in virtual) if you haven’t: (remember to use pip install):

• Flask 1.1.4
• Gunicorn
• Argcomplete 2.0.0
• MarkUpsafe 2.0.1
• Django-cors-header 3.11.0

1. Generate a requirements.txt using: pip freeze > requirements.txt

2. Create a runtime.txt in the project root folder file and add then python version you’re using: For example: python-3.9.12

3. On terminal, run heroku config:set DISABLE_COLLECTSTATIC=1

--->Lastly, 1.Git add . =>2. Git Commit -m ”deployment updates” => 3.Git push heroku main/master(depending on your branch name)

Remember: A new bug after fixing the previous one is progress… Happy Hacking!