Example of using boto3 for file uploading and downloading to Minio storage with docker-compose.
Run docker-compse up --build to see how it works.
You could also go inside the containers and find the my_file.txt file with docker exec -it <container-name> /bin/bash.
Print all containers with docker ps.
For example go inside minio container with
docker exec -it my_minio /bin/bash
There do cd my_minio/export/my-bucket/my_data and you should find my_file.txt (ls).
Run exit to leave the container.