After uploading django to heroku, server error 500 occurs.

import os
import dj_database_url

BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

SECRET_KEY = 'Original Present'
DEBUG = False

ALLOWED_HOSTS = ['*']
INSTALLED_APPS = [
    'blog',
    'basecamp',


    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.sites',
    'django.contrib.staticfiles',
    'django_extensions',

    'allauth',
    'allauth.account',
    'allauth.socialaccount',
    'allauth.socialaccount.providers.google',

    'markdownx',
    'crispy_forms',
    'storages',
]

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',
    'whitenoise.middleware.WhiteNoiseMiddleware',
]

ROOT_URLCONF = 'my_site_prj.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 = 'my_site_prj.wsgi.application'
DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
    }
}
DATABASES['default'].update(dj_database_url.config(conn_max_age=500))
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',
    },
]
LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'Asia/Seoul'

USE_I18N = True

USE_L10N = True

USE_TZ = True

AUTHENTICATION_BACKENDS = (
    'django.contrib.auth.backends.ModelBackend',
    'allauth.account.auth_backends.AuthenticationBackend',
)

ACCOUNT_EMAIL_REQUIRED = True
ACCOUNT_EMAIL_VERIFICATION = 'none'

# # STATIC_URL = '/static/'
# # STATIC_ROOT = os.path.join(BASE_DIR, 'staticfiles')

MEDIA_ROOT = os.path.join(BASE_DIR, '_media')
MEDIA_URL = '/media/'

from datetime import datetime

MARKDOWNX_MEDIA_PATH = datetime.now().strftime('markdownx/%Y/%m/%d')

CRISPY_TEMPLATE_PACK = 'bootstrap4'

LOGIN_REDIRECT_URL = '/blog/'

AWS_ACCESS_KEY_ID = ' # Original Present
AWS_SECRET_ACCESS_KEY = '' #Original Present
AWS_REGION = 'ap-northeast-2'
AWS_STORAGE_BUCKET_NAME = 'inflearn-django'
AWS_S3_CUSTOM_DOMAIN = '%s.s3.%s.amazonaws.com' % (AWS_STORAGE_BUCKET_NAME, AWS_REGION)
AWS_S3_OBJECT_PARAMETERS = {
    'CacheControl': 'max-age=86400',
}
DEFAULT_FILE_STORAGE = 'my_site_prj.asset_storage.MediaStorage'

beautifulsoup4==4.8.1
boto3==1.10.45
botocore==1.13.45
certifi==2019.11.28
cffi==1.13.2
chardet==3.0.4
cryptography==2.8
defusedxml==0.6.0
dj-database-url==0.5.0
Django==2.2
django-allauth==0.41.0
django-crispy-forms==1.8.1
django-extensions==2.2.5
django-markdownx==2.0.28
django-storages==1.8
docutils==0.15.2
gunicorn==20.0.4
idna==2.8
jmespath==0.9.4
Markdown==3.1.1
oauthlib==3.1.0
Pillow==6.2.1
psycopg2-binary==2.8.4
pycparser==2.19
python-dateutil==2.8.1
python3-openid==3.1.0
pytz==2019.3
requests==2.22.0
requests-oauthlib==1.3.0
s3transfer==0.2.1
six==1.13.0
soupsieve==1.9.5
sqlparse==0.3.0
urllib3==1.25.7
whitenoise==5.0.1

from django.contrib import admin
from django.urls import path, include

urlpatterns = [
    path('blog/', include('blog.urls')),
    path('admin/', admin.site.urls),
    path('markdownx/', include('markdownx.urls')),
    path('accounts/', include('allauth.urls')),
    path('', include('basecamp.urls')),
]