Dockerizing a Flask application

TL;DR

Here's the docker-compose.yml file to dockerize a Flask application, a Mongo database and a schedule service:

version: '3.8'

services:
  app:
    container_name: my_app_${ENV}
    build:
      context: . 
    ports:
      - 8001:8001
    depends_on:
      - mongo_db
    networks:
      - my_network
    command: ["flask", "run", "--host", "0.0.0.0", "--port", "8001"]
    env_file: .env

  schedule_service:
    container_name: schedule_service_${ENV}
    build:
      context: ./scheduler
    volumes:
      - ./common:/app/common
      - ./db:/app/db  
    networks:
      - my_networknetwork
    command: ["python", "-u", "scheduler.py"] 
    env_file: .env

  mongo_db:
    container_name: mongo_db_${ENV}
    image: mongo:4.4.18
    restart: always
    ports:
      - 27017:27017
    volumes:
      - ./DB-STORAGE/mongo-db-$ENV:/data/db
      - ./db/init-mongo.sh:/docker-entrypoint-initdb.d/init-mongo.sh
    networks: …

app application build command context database docker docker-compose file flask networks python service services