feat(grainlab): Added Staging SMTP setup.

manifests/artemis/grainlab-staging/app-deployment.yaml

@@ -4,7 +4,7 @@ metadata:
   name: grainlab
   namespace: grainlab-staging
 spec:
-  replicas: 1
+  replicas: 0
   selector:
     matchLabels:
       app: grainlab
@@ -36,6 +36,8 @@ spec:
                 name: grainlab-database
             - secretRef:
                 name: grainlab-s3
+            - secretRef:
+                name: grainlab-smtp
           readinessProbe:
             httpGet:
               path: /