Error
docker push error "denied: requested access to the resource is denied"
https://stackoverflow.com/questions/43858398/docker-push-error-denied-requested-access-to-the-resource-is-deniedVersion in "./docker-compose.yml" is unsupported. You might be seeing this error because you're using the wrong Compose file version
https://stackoverflow.com/questions/42139982/version-in-docker-compose-yml-is-unsupported-you-might-be-seeing-this-error
General
How Docker Images Work: Union File Systems for Dummies
https://www.terriblecode.com/blog/how-docker-images-work-union-file-systems-for-dummies/Who's using Docker?
https://opensource.com/business/14/7/docker-through-hypeBefore And After Docker: How To Deploy An Application
https://thehftguy.com/2016/11/14/what-is-docker-and-when-to-use-it/Differences between a Dockerfile, Docker Image and Docker Container
https://nickjanetakis.com/blog/differences-between-a-dockerfile-docker-image-and-docker-container