Hello World Flask API for Lightsail

Dockerfile

FROM python:3

ADD helloworld.py /
RUN pip install flask
RUN pip install flask_restful

EXPOSE 80

CMD [ "python", "./helloworld.py"]

helloworld.py

from flask import Flask, request
from flask_restful import Resource, Api

app = Flask(__name__)
api = Api(app)

class Greeting (Resource):
   def get(self):
      return { "message" : "Hello peeps!" }

api.add_resource(Greeting, '/') # Route_1

if __name__ == '__main__':
   app.run('0.0.0.0','80')