Update README.md

ColdHeat · web-flow · commit 1908cb146766 · 2017-10-10T15:24:05.000-04:00
diff --git a/README.md b/README.md
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 # CTFd-Docker
 Plugin to give CTFd the ability to manage Docker containers
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+This feature was extracted from CTFd and made into a plugin during the development of the plugin architecture. 
