部署到Heroku时出现Flask App错误，地址为=错误代码= H10 desc =“应用程序崩溃”方法= GET路径=“ /”

Question

示例烧瓶应用程序在Heroku中部署时给出错误，错误代码为==错误代码= H10 desc =“应用程序崩溃”，方法= GET路径=“ /”。

Flaskapp.py

from flask import Flask

app = Flask(__name__)


@app.route('/')
def index():
    return "<h1> Deployed to Heroku</h1>"


if __name__ == "__main__":
    app.run()'''

Pocfile

web : gunicorn flaskapp:app

requirements.txt

Click==7.0
Flask==1.1.1
gunicorn==20.0.4
itsdangerous==1.1.0
Jinja2==2.10.3
MarkupSafe==1.1.1
Werkzeug==0.16.0

下面的错误日志

2020-01-10T10:35:14.658092+00:00 heroku[web.1]: Starting process with command `: gunicorn flaskapp:app`
2020-01-10T10:35:16.404755+00:00 heroku[web.1]: State changed from starting to crashed
2020-01-10T10:35:16.381754+00:00 heroku[web.1]: Process exited with status 0
2020-01-10T10:35:19.000000+00:00 app[api]: Build succeeded
2020-01-10T10:35:38.654704+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=flaskapp-te.herokuapp.com request_id=6712472d-a734-4720-b152-1e2716844c41 fwd="137.97.4.98" dyno= connect= service= status=503 bytes= protocol=https
2020-01-10T10:35:39.689766+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=flaskapp-te.herokuapp.com request_id=89a26803-5b09-4a94-99a2-5b0d154d7797 fwd="137.97.4.98" dyno= connect= service= status=503 bytes= protocol=https

跟随一些博客，无法解决。请协助

Answer 1

将下面的post中提到的Procfile修改为

web: gunicorn --bind 0.0.0.0:$PORT flaskapp:app