install.md: docker usage

Author: sigua-cs

docs/content/en/install.md

@@ -22,3 +22,20 @@ go get -u github.com/ContentSquare/chproxy
 ```
 
 If you don't have Go installed on your system - follow [this guide](https://golang.org/doc/install).
+
+
+### Docker
+
+Chproxy is also available as a Docker image in a public repository on DockerHub.
+
+Download the image and run the container:
+
+```
+docker run -d -v <LOCAL CONFIG>:/config.yml contentsquareplatform/chproxy:<VERSION TAG> -config /config.yml
+```
+
+Example:
+
+```
+docker run -d -v $(pwd)/config/examples/simple.yml:/config.yml contentsquareplatform/chproxy:1.15.0 -config /config.yml
+```