Heroku 应用程序成功部署，但在加载站点时收到应用程序错误

Question

据我所知，我的日志没有指出任何错误，但是在加载站点时我收到以下错误：

An error occurred in the application and your page could not be served. If you are the application owner, check your logs for details. You can do this from the Heroku CLI with the command heroku logs --tail

您可以在下面找到日志。我在这里错过了什么吗？

-----> Python app detected
-----> Uninstalling stale dependencies
       Uninstalling Django-2.1.5:
         Successfully uninstalled Django-2.1.5
       Uninstalling Pillow-5.4.1:
         Successfully uninstalled Pillow-5.4.1
-----> Installing requirements with pip
       Collecting dj-database-url==0.5.0 (from -r /tmp/build_99fe21a8dcc00005ce600053adc20260/requirements.txt (line 1))
         Downloading https://files.pythonhosted.org/packages/d4/a6/4b8578c1848690d0c307c7c0596af2077536c9ef2a04d42b00fabaa7e49d/dj_database_url-0.5.0-py2.py3-none-any.whl
       Collecting Django==2.1.5 (from -r /tmp/build_99fe21a8dcc00005ce600053adc20260/requirements.txt (line 2))
         Downloading https://files.pythonhosted.org/packages/36/50/078a42b4e9bedb94efd3e0278c0eb71650ed9672cdc91bd5542953bec17f/Django-2.1.5-py3-none-any.whl (7.3MB)
       Collecting django-heroku==0.3.1 (from -r /tmp/build_99fe21a8dcc00005ce600053adc20260/requirements.txt (line 3))
         Downloading https://files.pythonhosted.org/packages/59/af/5475a876c5addd5a3494db47d9f7be93cc14d3a7603542b194572791b6c6/django_heroku-0.3.1-py2.py3-none-any.whl
       Collecting gunicorn==19.9.0 (from -r /tmp/build_99fe21a8dcc00005ce600053adc20260/requirements.txt (line 4))
         Downloading https://files.pythonhosted.org/packages/8c/da/b8dd8deb741bff556db53902d4706774c8e1e67265f69528c14c003644e6/gunicorn-19.9.0-py2.py3-none-any.whl (112kB)
       Collecting Pillow==5.4.1 (from -r /tmp/build_99fe21a8dcc00005ce600053adc20260/requirements.txt (line 5))
         Downloading https://files.pythonhosted.org/packages/ae/2a/0a0ab2833e5270664fb5fae590717f867ac6319b124160c09f1d3291de28/Pillow-5.4.1-cp37-cp37m-manylinux1_x86_64.whl (2.0MB)
       Collecting psycopg2==2.8.2 (from -r /tmp/build_99fe21a8dcc00005ce600053adc20260/requirements.txt (line 6))
         Downloading https://files.pythonhosted.org/packages/23/7e/93c325482c328619870b6cd09370f6dbe1148283daca65115cd63642e60f/psycopg2-2.8.2.tar.gz (368kB)
       Collecting whitenoise==4.1.2 (from -r /tmp/build_99fe21a8dcc00005ce600053adc20260/requirements.txt (line 8))
         Downloading https://files.pythonhosted.org/packages/fd/2a/b51377ab9826f0551da19951257d2434f46329cd6cfdf9592ea9ca5f6034/whitenoise-4.1.2-py2.py3-none-any.whl
       Installing collected packages: dj-database-url, Django, whitenoise, psycopg2, django-heroku, gunicorn, Pillow
         Running setup.py install for psycopg2: started
           Running setup.py install for psycopg2: finished with status 'done'
       Successfully installed Django-2.1.5 Pillow-5.4.1 dj-database-url-0.5.0 django-heroku-0.3.1 gunicorn-19.9.0 psycopg2-2.8.2 whitenoise-4.1.2
-----> $ python manage.py collectstatic --noinput
       119 static files copied to '/tmp/build_99fe21a8dcc00005ce600053adc20260/staticfiles', 375 post-processed.
-----> Discovering process types
 ~     Mis-cased procfile detected; ignoring.
 ~     Rename it to Procfile to have it honored.
       Procfile declares types -> (none)
-----> Compressing...
       Done: 68.2M
-----> Launching...
       Released v7
       https://andrew-data-incubator-project.herokuapp.com/ deployed to Heroku

Answer 1

 ~     Mis-cased procfile detected; ignoring.
 ~     Rename it to Procfile to have it honored.

尝试重命名procfile，以Procfile作为日志消息表明。