Update README.md

This change updates the command to run the docker image to specify the hostname. Fixes earthlab#15

Author: Jenny Palomino

README.md

@@ -65,7 +65,7 @@ docker run -it -p 8888:8888 earthlab/earth-analytics
 
 To run your earth-analytics image you use the following code:
 
-`docker run -it -p 8888:8888 earthlab/earth-analytics`
+`docker run --hostname localhost -it -p 8888:8888 earthlab/earth-analytics-python-env`
 
 NOTE: `earthlab/earth-analytics` is the name of this image as built above. To
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