Add demo gif to README (#485)

Author: deliahu

README.md

@@ -1,12 +1,14 @@
-<img src='https://s3-us-west-2.amazonaws.com/cortex-public/logo.png' height='88'>
-
-<br>
+<img src='https://cortex-public.s3-us-west-2.amazonaws.com/logo.png' height='88'>
 
 <!-- CORTEX_VERSION_MINOR_STABLE x2 -->
 [install](https://docs.cortex.dev/v/master/install) • [docs](https://docs.cortex.dev/v/master) • [examples](examples) • [we're hiring](https://angel.co/cortex-labs-inc/jobs) • [email us](mailto:[email protected]) • [chat with us](https://gitter.im/cortexlabs/cortex)
 
 <br>
 
+![Cortex demo](https://cortex-public.s3-us-west-2.amazonaws.com/demo/gif/v0.8.gif)
+
+<br>
+
 Cortex is a machine learning deployment platform that you can self-host on AWS. It combines TensorFlow Serving, ONNX Runtime, and Flask into a single tool that takes models from S3 and deploys them as REST APIs. It also uses Docker and Kubernetes behind the scenes to autoscale, run rolling updates, and support CPU and GPU inference.
 
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