Build Flask environment with Dockerfile + docker-compose.yml

As a memorandum when you want to easily build a flask environment.

Execution environment

Directory structure

test/
   |- Dockerfile
   |- docker-compose.yml
   |- app/
      |- app.py

Description of each file

Dockerfile

FROM ubuntu:latest

RUN apt-get update
RUN apt-get install python3 python3-pip -y

RUN pip3 install flask

RUN mkdir /app

docker-compose.yml

Define the following procedure in this file.

version: '3'
services: 
    web:
        build: .
        command: python3 app/app.py
        volumes:
            - ./app:/app
        ports:
            - 5000:5000

app/app.py

Now you are ready.

Build → Container start → Web server start

$ docker-compose up -d
$ docker-compose ps
   Name           Command         State           Ports         
----------------------------------------------------------------
test_web_1   python3 app/app.py   Up      0.0.0.0:5000->5000/tcp

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