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Move over Java

PHP is the new market leader:

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Move over CoreOS and Atomic

Theres another Docker-centric OS in town: RancherOS

"Hopefully, this will allow users to focus more on their container workloads and less on managing the servers running them."

- Darren Shepherd 

Ive found its easier and more reliable than boot2docker for local development, but you may want to consider the security ramifications before using it in production.

P.S. Check out their orchestration tool as well: Rancher

Available link for download