Use env in service manifests for PORT (#212)

* fix shipping service ports

* fix product catalog servicde ports

* fix paymentservice ports

* fix currenservice ports

* fix checkoutservice ports

* fix emailservice ports

* fix frontend app ports

* fix recommendationservice ports

* fix indentation in service yaml files

kubernetes-manifests/emailservice.yaml

@@ -31,6 +31,9 @@ spec:
         image: emailservice
         ports:
         - containerPort: 8080
+        env:
+        - name: PORT
+          value: "8080"
         readinessProbe:
           periodSeconds: 5
           exec: