Sachin, you could take a look at the Kubernetes exec plugin example which uses the exec plugin. The example demonstrates an approach that you could use to templated a shell script that do whatever you want. E.g. something special in Nomad or setup Docker networks and volumes until the Docker plugin gets more full featured in the platform capabilities. In your case, would you expect to be using networks and volumes that already exist, or would you expect Waypoint to create them during waypoint deploy.
Do you have an example Job file that shows what you’d want to be able to do in Nomad?