Update README

README.md

@@ -37,7 +37,7 @@ In order to deploy this app on Kubernetes we will need to complete the following
 ![alt text](img/access_token_6.png)
 3. Create the Dockerfile
 
-```Docker
+```docker
 # https://docs.docker.com/engine/reference/builder/
 # FROM refer the image where we start from
 # Here we will use a basic python 3 debian image