docker user id as current user

readme.md

https://medium.com/redbubble/running-a-docker-container-as-a-non-root-user-7d2e00f8ee15

docker run -u $(id -u):$(id -g)

for compose, run the following with CURRENT_UID=$(id -u):$(id -g) docker-compose up :

version: '3.3'
services:
  rspec:
    image: my-docker/my-build-environment:latest
    environment:
      - RAILS_ENV=test
    command: ["make", "assets"]

    # THIS BIT!!!1!
    user: ${CURRENT_UID}

    volumes:
      - .:/app