Update README.md

Author: dopecodez

README.md

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 Create a modern express server with a single command.
 
-<img src="https://media.giphy.com/media/ej7o4MAvd2LI4kOM6F/giphy.gif" alt="Working sample" height="200" width="300"/>
+<img src="https://media.giphy.com/media/ej7o4MAvd2LI4kOM6F/giphy.gif" alt="Working sample" height="400" width="750"/>
 
 Scale a development ready server in **one step**.