Docker

# app.py
from flask import Flask
import os

app = Flask(__name__)

@app.route('/')
def hello():
    return "Hello from inside a Docker Container!"

if __name__ == '__main__':
    # The host '0.0.0.0' makes the server publicly available
    # which is necessary for Docker port mapping
    app.run(debug=True, host='0.0.0.0', port=int(os.environ.get('PORT', 8080)))