add the open api execute command

[4geru]

Docker is a helpful tool for developers.
However, this repository doesn't have a manual to stand up Docker.
Therefore, I added the Docker command to the Makefile and README.md.

[github-actions]

⚠️ Attention @4geru!
Thank you for your interest in contributing to this repository!

This repository primarily exists to convert publicly available LINE APIs into OpenAPI YAML, making it easier for developers to access the features.
Our employees mainly update the schema based on the latest features and changes in our APIs.

Therefore, it is not intended for open contributions by editing files in this repository, from outside contributors.

Please start by creating an issue and discussing it there. You may close this pull request and create an issue instead.

==
If you are an employee participating in this organization, please push branches directly to this repository to create PR, instead of using a forked repository.

[mokuzon]

@4geru Thank you for your excellent suggestion and pull request!
For this kind of use, using docker-compose would be simpler, as it eliminates the dependency on Make. What do you think?

[Yang-33]

#55

[4geru]

@mokuzon I created the docker-compose.yml 🤝