hungerzs/rancherOS: docker os @ v0.8.x

Sven Dowideit 980ee23130 import the rancherOS docs so we can write docs for the next release		8 年之前
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boot-from-iso	980ee23130 import the rancherOS docs so we can write docs for the next release	8 年之前
docker-machine	980ee23130 import the rancherOS docs so we can write docs for the next release	8 年之前