Merge pull request #2098 from Jentsch/Fix-Readme

Fix docker port in Readme.md

Author: SethTisue

README.md

@@ -22,7 +22,7 @@ To build and view site with docker:
 
     docker-compose up
 
-It will incrementally build and serve site at `http://localhost:8080`
+It will incrementally build and serve site at `http://localhost:4000`
 
 ## Contributing ##