Modify badges in README.md

Updated Codespaces badge and added Docker Hub badge.

Author: sbryngelson

README.md

@@ -33,8 +33,12 @@
     <img src="https://img.shields.io/badge/discussions-join-brightgreen" />
   </a>
   <a href="https://github.com/codespaces/new?hide_repo_select=true&ref=master&repo=MFlowCode%2FMFC">
-    <img src="https://img.shields.io/badge/Codespaces-Open%20in%201%20click-2ea44f?logo=github" />
+    <img src="https://img.shields.io/badge/Codespaces-Open-2ea44f?logo=github" />
   </a>
+  <a href="https://hub.docker.com/r/sbryngelson/mfc">
+    <img src="https://img.shields.io/badge/dockerhub-images-important.svg?logo=Docker&style=flat" />
+  </a>	
+	
   <a href="https://github.com/MFlowCode/homebrew-mfc">
     <img src="https://img.shields.io/badge/homebrew-mflowcode%2Fmfc%2Fmfc-brown?logo=homebrew&style=flat" />
   </a>