port updated for docker

Author: amoljagadambe

README.md

@@ -33,7 +33,7 @@ Install Dependencies in Virtual Environment::
 
     $ docker image build -t flask-app .
 
-    $ docker run -p 8000:8000 -d --name flask-application flask-app
+    $ docker run -p 3000:3000 -d --name flask-application flask-app
 
 Save/Load the docker image(optional)
 ----