A Dockerized Flask "Hello, World!"

README.md

Blog 2019/8/16

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A Dockerized Flask "Hello, World!"

cobbled together from a few tutorials online.

Just run make.

Dockerfile

FROM python:3-alpine

WORKDIR /opt/hello-flask

COPY requirements.txt ./
RUN pip install --no-cache-dir -r requirements.txt

COPY . .

CMD ["python", "./hello-flask.py"]

hello-flask.py

#!/usr/bin/env python

from flask import Flask

app = Flask(__name__)

@app.route('/')
def hello_flask():
    return "Hello, Flask!"

if __name__ == '__main__':
    # enable debug mode by setting the env var FLASK_ENV=development
    app.run(host='0.0.0.0', port=80)

Makefile

run: build
	docker run -it --rm -p 5000:80 -e FLASK_ENV='development' hello-flask

build:
	docker build -t hello-flask .

requirements.txt

Flask==1.1.1