Adding custom routes to simple network service client

routes.patch

diff --git a/k8s/conf/nsc.yaml b/k8s/conf/nsc.yaml
index 43f17e2b..d4f18be3 100644
--- a/k8s/conf/nsc.yaml
+++ b/k8s/conf/nsc.yaml
@@ -15,8 +15,18 @@ spec:
         - name: alpine-img
           image: alpine:latest
           command: ['tail', '-f', '/dev/null']
+      initContainers:
+        - name: nsm-init-container
+          image: networkservicemesh/nsm-init:master
+          imagePullPolicy: IfNotPresent
+          env:
+            - name: NS_NETWORKSERVICEMESH_IO
+              value: icmp-responder?app=icmp
+            - name: ROUTES
+              value: "8.8.8.8/30"
+          resources:
+            limits:
+              networkservicemesh.io/socket: "1"
 metadata:
   name: alpine-nsc
   namespace: nsm-system
-  annotations:
-    ns.networkservicemesh.io: icmp-responder?app=icmp