Getting a "403 access denied" after following tutorial

I followed the tutorial located here, Everything seemed to go as the tutorial said it would - except now I'm getting a 403 Forbidden error. I have nginx, gunicorn and django all installed. The nginx just gives me the following error:

2021/11/13 07:16:37 [error] 59#59: *3 directory index of "/var/www/html/" is forbidden, client: 172.17.0.1, server: _, request: "GET / HTTP/1.1", host: "SERVER-IP:80"

I tried running:

chown -R www-data:www-data /var/www/html/

In order to fix this permission issue, but it didn't appear to work. What am I doing wrong? Below are my configuration files.

cat /etc/nginx/sites-enabled/blog

upstream django {
    server 127.0.0.1:80;
}

server {
    listen 172.17.0.1:80; 
    server_name SERVER-IP; 
    location = /favicon.ico { access_log off; log_not_found off; } 
    location /assets {
    alias /var/www/html/mysite/assets/;
    }
    location / {
    autoindex on;
    uwsgi_pass unix:///run/uwsgi/django/socket;
    include /var/www/html/mysite/mysite/uwsgi_params;
    }
}

cat /var/www/html/mysite/mysite/settings.py

"""
Django settings for mysite project.

Generated by 'django-admin startproject' using Django 2.2.24.

For more information on this file, see
https://docs.djangoproject.com/en/2.2/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/2.2/ref/settings/
"""

import os

# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
STATIC_ROOT = "/var/www/html/mysite/blog/templates/blog/"
STATIC_URL = "/assets/"
STATICFILES_DIRS = [
        os.path.join(BASE_DIR, 'assets')
        ]

# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/2.2/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'a$q095hnr8-f6o)k)!pk4i*p^al&z@j3pq41#a063ops3upk$6'

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = False

ALLOWED_HOSTS = ['*']


# Application definition

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'blog',
    ]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    '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',
]

ROOT_URLCONF = 'mysite.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

WSGI_APPLICATION = 'mysite.wsgi.application'


# Database
# https://docs.djangoproject.com/en/2.2/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
    }
}


# Password validation
# https://docs.djangoproject.com/en/2.2/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]


# Internationalization
# https://docs.djangoproject.com/en/2.2/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_L10N = True

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/2.2/howto/static-files/

# STATIC_URL = '/static/