FLASK_APP: not found

[saravanand78]

Hi Mumshad,

Getting error message , FLASK_APP: not found when i try to execute command
docker run -p host port: container port docker image-name

Created a docker file using sample code provided in simple-webapp-flask application. Created an image, but when i execute the above command, get error message flask:app not found.

Below is the code snippet for app.py and docker file

app.py

import os
from flask import Flask
app = Flask(name)

@app.route("/")
def main():
return "Welcome!"

@app.route('/how are you')
def hello():
return 'I am good, how about you?'

if name == "main":
app.run(host="0.0.0.0", port=8080)

Dockerfile

FROM ubuntu
RUN apt-get update
RUN apt-get install -y python3 python3-pip
RUN pip install flask
COPY app.py /opt/app.py
ENTRYPOINT FLASK_APP = /opt/app.py flask run --host=0.0.0.0

could you pls advice

regards
Saravanan