Sample Flask App - Ping Service

app.py

from flask import Flask
app = Flask(__name__)

import requests

@app.route('/')
def ping_service():
    return 'Hello, I am ping service!'

@app.route('/ping')
def do_ping():
    ping = 'Ping ...'

    response = ''
    try:
        response = requests.get('http://pong-service-container:5001/pong')
    except requests.exceptions.RequestException as e:
        print('\n Cannot reach the pong service.')
        return 'Ping ...\n'

    return 'Ping ... ' + response.text + ' \n'

if __name__ == "__main__":
    app.run(host ='0.0.0.0', port = 5000, debug = True)

Dockerfile

FROM python:3.8-slim-buster
COPY . /app
WORKDIR /app
RUN pip install -r requirements.txt
ENTRYPOINT [ "python" ]
CMD [ "app.py" ]

requirements.txt

Flask==0.12
requests==2.25.1

Not work