Allow example to run as script

Doing apply, logs, delete in sequence as fast as a script does
has the unfortuante effect that it does logs before the pod is
ready.

Adding a wait sorts that.

Sending ctrl+c to break logs will however terminate bash before
delete can run.

Putting delete in a trap sorts that.

Author: azzid

README.md

@@ -86,9 +86,12 @@ docker run --privileged --rm -t --pid=host -v /sys/kernel/debug/:/sys/kernel/deb
 
 The following example shows how to run `pwru` on a given node:
 ```
+#!/usr/bin/env bash
 NODE=kind-control-plane
 PWRU_ARGS="--output-tuple 'host 1.1.1.1'"
 
+trap " kubectl delete --wait=false pod pwru " EXIT
+
 kubectl apply -f - <<EOF
 apiVersion: v1
 kind: Pod
@@ -116,8 +119,8 @@ spec:
   hostPID: true
 EOF
 
+kubectl wait pod pwru --for condition=Ready --timeout=90s
 kubectl logs -f pwru
-kubectl delete pod pwru
 ```
 
 ### Running on Vagrant