use composer via docker

composer php via docker

I'm working on project php based (sepc. code igniter 3), which composer gonna be a tools to install dependencies/library. But i don't want to install it on my local.
so I decide to using container as my virtual environment, to do that you can see my Dockerfile on my project here https://github.com/4sskick/infra/blob/master/php-cli/Dockerfile
on the last line, I add command to run curl command to install composer that will attached on my container I'm gonna built after.
to use command composer, you can folllow this command:
- see container ID by command `docker container ls`
- if you use my project infra on my github, it would be using `docker-compose up` to run all services, then see on section ck_php there would be container ID after hit command `docker container ls`
attach the container by command `docker exec -it <container-ID> sh -c "composer --version" `
- it gonna print you the version of composer installed then exit after done
- everytime you need to use composer, you need to hit command `docker exec -it <container-ID> sh -c "command-compose-here" `

*note: FYI, the composer config you used will directly appeared on your local machine workdir you set.