add docker badge

Author: aksakalli

README.md

@@ -7,6 +7,8 @@ System monitoring dashboard for terminal.
   [![NPM Version](https://img.shields.io/npm/v/gtop.svg)](https://npmjs.org/package/gtop)
   [![NPM Downloads](https://img.shields.io/npm/dm/gtop.svg)](https://npmjs.org/package/gtop)
   [![Snap Status](https://build.snapcraft.io/badge/aksakalli/gtop.svg)](https://build.snapcraft.io/user/aksakalli/gtop)
+  [![Docker Pulls](https://img.shields.io/docker/pulls/aksakalli/gtop)](https://hub.docker.com/r/aksakalli/gtop)
+  [![Docker Cloud Build Status](https://img.shields.io/docker/cloud/build/aksakalli/gtop)](https://hub.docker.com/r/aksakalli/gtop/builds)
 
 ### Requirements