I deployed my Django app to Heroku, but after following all the required steps, I’m encountering persistent errors. Specifically, my logs show 503 errors for GET requests to "/" and "/favicon.ico", with the message indicating that no web processes are running and a "Method Not Allowed" error.

Here’s what I’ve done so far:

1. Created a Procfile in the project root with the following content:

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web: gunicorn Django_project.wsgi --log-file -

• Verified the file name (capital ‘P’).

• Ensured that gunicorn, Django, and all other dependencies are listed in requirements.txt.

2. Pushed the changes to Heroku:

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git push heroku main

3. Ran the database migrations on Heroku:

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heroku run python manage.py migrate

4. Attempted to scale web dynos:

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heroku ps:scale web=1

Received an error indicating that no web processes are running.

5. Configured Django settings:

• Added the Heroku app URL to ALLOWED_HOSTS:

PYTHONCopied
ALLOWED_HOSTS = ["http://rentaltz.herokuapp.com"]

• Configured static files and Whitenoise correctly in the MIDDLEWARE setting:

PYTHONCopied
MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'whitenoise.middleware.WhiteNoiseMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

6. Checked the Heroku logs, which include messages like:

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at=error code=H14 desc="No web dynos running"

My app works perfectly locally, and I’ve followed best practices using gunicorn and Whitenoise. I’ve also tried different branches and a full redeployment, but the issue persists.

Can anyone help me understand why I’m encountering these errors, particularly the "no web processing" issue, and suggest any configuration corrections or missing steps?