[Answer]-Cannot sync database for Django app on its Heroku postgres database

So it turns out the that the problem was that I had another file called local.py in my settings folder for my project. Tree as follows:

├── microblog
│   ├── __init__.py
│   ├── __init__.pyc
│   ├── settings
│   │   ├── base.py
│   │   ├── base.pyc
│   │   ├── __init__.py
│   │   ├── __init__.pyc
│   │   ├── local.py
│   │   └── local.pyc
│   ├── settings.pyc
│   ├── urls.py
│   ├── urls.pyc
│   ├── wsgi.py
│   └── wsgi.pyc
├── Procfile
└── requirements.txt

Since I was following the Getting Started wit Django Tutorial, I had the following in my local.py file:

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'USER': '<user>',
        'PASSWORD': '<pwd>',
        'NAME': '<name>',
        'HOST': 'localhost',
    }
}

That was causing the problem. I tried adding the file to my .gitignore, but that didn’t work. The solution was to actually comment these lines out.