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docker/README.md

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+# Docker Best Practices
+
+## Installation in macOS
+
+```
+brew cask install docker
+```
+
+### Shared Folders
+
+Removing some of the default shared folders can decrease CPU usage (e.g. remove `/Volumes` and `/private`). 
+
+Check storage with:
+
+```
+docker info |grep Storage
+```
+
+### Performance
+
+In case of performance problems you can run:
+
+```
+docker run --rm=true -it --privileged --pid=host \
+    <image name> /usr/bin/top
+```
+
+### Cleaning Up
+
+See disk space:
+
+```
+docker system df
+```
+
+
+Remove stopped containers, dangling images, the build cache, and unused networks:
+
+```
+docker system prune
+```
+
+### Tutorials and Articles
+
+### Containers in General
+
+* [Container Technology Wiki ](https://www.aquasec.com/wiki/display/containers/).
+
+####  Docker Certified Associate exam
+
+* [250 Practice Questions for the DCA Exam](https://medium.com/bb-tutorials-and-thoughts/250-practice-questions-for-the-dca-exam-84f3b9e8f5ce).
+