Dockerization of the application

[MatthMig]

The application should be dockerized for deployement purpose on SciCatLive.
I have solved the problem in this commit (the message of the commit is not really relevant): eaebfd4

The corresponding part in SciCatLive would be in scicatlive: services/ingestor/compose.yaml:

services:
  ingestor:
    image: docker.ill.fr/scicat-ill/ingestor:latest
    depends_on:
      backend:
        condition: service_healthy
    env_file: .env
    environment:
      CONFIG_FILE: /app/config/config.sample.json
    volumes:
      - ./config/config.sample.json:/app/config/config.sample.json:ro
      - /illdata:/illdata:ro
    logging:
      driver: "json-file"
      options:
        max-size: "10m"
        max-file: "3"