creating a simple hello world app for a Slack slash command.

slack_slash-hello_world.py

from flask import Flask
import os

app = Flask(__name__)

@app.route("/hello", methods=['POST'])
def hello():
	return "Hello World!"

if __name__ == '__main__':
	port = int(os.environ.get('PORT', 5000))
	app.run(host='0.0.0.0', port=port, debug=True)