fusengine/composer repository overview

VOLUME : /root/.composer , /app
add your config on /root/.composer
exemple auth.json

 $ docker run --rm -v $(pwd):/app fusengine/composer install

 $ docker run --rm -v $(pwd):/app -v ~/.ssh:/root/.ssh fusengine/composer install

Use symfony => symfony new blog
Use composer => composer.

for exemple: composer create-project --prefer-dist laravel/laravel myproject