Latest 14.0 dockerfile: https://github.com/odoo/docker/tree/master/14.0

There is an official docker image on dockerhub:

https://hub.docker.com/_/odoo

S imple compose file (More at the link above): 

version: '2'
services:
  web:
    image: odoo:13.0
    depends_on:
      - db
    ports:
      - "8069:8069"
  db:
    image: postgres:10
    environment:
      - POSTGRES_DB=postgres
      - POSTGRES_PASSWORD=odoo
      - POSTGRES_USER=odoo