The biggest advantage of docker I've seen so far is Dokku [1]. If I want to get a dev-instance up and running to show to coworkers (or the client) I just can do

The biggest advantage of docker I've seen so far is Dokku [1]. If I want to get a dev-instance up and running to show to coworkers (or the client) I just can do "git remote add dokku dokku@example.com && git push dokku master" and share the link with them. And with very little modifications the same can be deployed at Heroku (though I don't use heroku personally). And if you follow the dokku instructions it's fairly easy to setup, while doing something similar without Dokku but nginx/apache+php/passenger would take a fair amount of time to setup and config to run like that. [1] https://github.com/progrium/dokku https://github.com/progrium/dokku