The installation instructions for Envoy is located on
Your-system-name >> Settings >> Install button. This gives you an example application with Envoy and OPA running as side-cars that you can deploy to a Kubernetes cluster. That sample application allows you to try out the features of Styra DAS.
Moreover, the installation instructions show you exactly how to configure Envoy and OPA.
Envoy must be configured to send OPA authorization requests for both ingress and egress traffic.
OPA must be configured to download policies and upload decisions logs and status for the appropriate DAS System.