cubicmushroom/composer repository overview

$ docker run --user $(shell id -u):$(shell id -g) -v ~/.composer:/.composer -v .:/var/www/html cubicmushroom/composer install
# or, as default command is install
$ docker run --user $(shell id -u):$(shell id -g) -v ~/.composer:/.composer -v .:/var/www/html cubicmushroom/composer

$ docker run --user $(shell id -u):$(shell id -g) -v ~/.composer:/.composer -v .:/var/www/html cubicmushroom/composer update

$ docker run --user $(shell id -u):$(shell id -g) -v ~/.composer:/.composer -v .:/var/www/html cubicmushroom/composer require symfony/symfony

# docker-composer.yml
version: '2'
services:
  composer:
    image:          cubicmushroom/docker-composer
    container_name: limtool_api_composer
    volumes:
      - ~/.composer:/.composer
      - .:/src

$ docker-compose run --user $(shell id -u):$(shell id -g) composer install
# or, as default command is install 
$ docker-compose run --user $(shell id -u):$(shell id -g) composer 

$ docker-compose run --user $(shell id -u):$(shell id -g) composer update

$ docker-compose run --user $(shell id -u):$(shell id -g) composer require symfony/symfony