readme for layer example

Author: dschep

aws-ffmpeg-layer/README.md

@@ -0,0 +1,9 @@
+# AWS FFmepg Layer & a service using it to create GIFs
+```
+git clone https://github.com/serverless/examples
+cd examples/aws-ffmpeg-layer
+sls deploy
+```
+
+See the blog post about this example for more details:
+https://serverless.com/blog/publish-aws-lambda-layers-serverless-framework/