add aws ingress controller doc

Author: Matt307082

opsdocs/mkdocs.yml

@@ -177,6 +177,7 @@ nav:
     - Install on Amazon AWS with Elastic Kubernetes Service: cloudproviders/aws/aws.md 
     - Expose the service :
         - Expose using a load balancer: cloudproviders/aws/aws-loadbalancer.md
+        - Expose using a nginx ingress controller: cloudproviders/aws/aws-ingress-controller.md
   - AZURE : 
     - Install on Microsoft AZURE Kubernetes service: cloudproviders/azure/azure.md
   - DigitalOcean :