Fix example validation

docs/tasks/inject-data-application/podpreset-allow-db-merged.yaml

@@ -28,7 +28,7 @@ spec:
           value: $(REPLACE_ME)
       envFrom:
         - configMapRef:
-          name: etcd-env-config
+            name: etcd-env-config
   volumes:
     - name: cache-volume
       emptyDir: {}

docs/tasks/inject-data-application/podpreset-allow-db.yaml

@@ -8,7 +8,7 @@ spec:
       role: frontend
   env:
     - name: DB_PORT
-      value: 6379
+      value: "6379"
     - name: duplicate_key
       value: FROM_ENV
     - name: expansion

docs/tasks/inject-data-application/podpreset-conflict-pod.yaml

@@ -13,7 +13,7 @@ spec:
         - mountPath: /cache
           name: cache-volume
       ports:
+        - containerPort: 80
   volumes:
     - name: cache-volume
       emptyDir: {}
-        - containerPort: 80

docs/tasks/inject-data-application/podpreset-replicaset-merged.yaml

@@ -1,6 +1,7 @@
 apiVersion: v1
 kind: Pod
 metadata:
+  name: frontend
   labels:
     app: guestbook
     tier: frontend