Docker-compose volume permission

Question

I am new to Docker and still learning.

I have a problem now, which drives me crazy as I am unable to figure out a pretty way to solve this for quite some time already.

So I have a very simple and common stack: nginx + php + mariadb + redis. The idea is to have a shared volume between php and nginx containers, which will contain the app and run the php and nginx images as a non-root user, say with uid 1001.

here is the docker-compose.yml that i have came up with:

version: '3.8'

volumes:
  app-data:
    driver: local
    driver_opts:
      type: bind
      o: uid=1001
      device: ./app

services:
  web:
    image: nginx:1.20
    user: "1001:1001"
    volumes:
      - ./nginx/server.conf:/etc/nginx/conf.d/default.conf:ro
      - ./nginx/nginx.conf:/etc/nginx/nginx.conf:ro
      - app-data:/usr/share/nginx/html
    depends_on:
      - php
  php:
    build:
      context: ./
      dockerfile: ./php/Dockerfile
    user: "1001:1001"
    volumes:
      - app-data:/usr/share/nginx/html
    depends_on:
      - db
      - redis

I have omitted the mariadb and redis, as they are not relevant to my question. Dockerfile for the php image is irrelevant as well, as it is used only to install couple of modules, which were not included in the default image. if i had a choice, i would avoid having any custom Dockerfiles at all.

so this isn't working because apparently uid is not recognized as a valid option, although documentation CLEARLY STATES that local driver with bind would take the SAME OPTIONS as the mount command.

My goal here is to have a docker-compose file which will:

• boot the neccessary services, i.e. db, php, nginx and redis
• will have a volume created using a local directory which stores the app
• have that volume shared between php and nginx images
• have php and nginx images run as non-root, with same uid, so that they can access the app directory.
• have no custom Dockerfiles

Could you please help me to achieve the goal? i would also appreciate any links to relevant documentation and/or best practices.

Thank you!

edit: i would also like to understand clearly if best-practices docker/docker-compose assume that the user would have custom Dockerfile's for the services with needed adjustments, or if it is supposed to use the stock images with all configs done on the docker-compose file.