SyntaxError: invalid character in identifier

Hi and thank you for this 
i am getting an error after running the docker 
i tried to change the ip to 127.0.0.1 but got the same
 any advise?
```
docker run -p 5000:5000 --name flask-app flask-node
  File "./app.py", line 9
    app.run(host = ‘0.0.0.0’, debug=True)
                    ^
SyntaxError: invalid character in identifier
```