Add Submariner

We're the main contributors to the project, and it is shipped as part
of Advanced Cluster Management for Kubernetes.

Signed-off-by: Stephen Kitt <skitt@redhat.com>

Author: skitt

app/data/projects.json

@@ -1221,6 +1221,15 @@
 		"twitterHandle": "",
 		"twitterURL": ""
   },
+  {
+    "projectName": "Submariner",
+    "projectDescription": "Submariner enables direct networking between Pods and Services in different Kubernetes clusters, either on-premises or in the cloud.",
+    "projectRepository": "https://github.com/submariner-io",
+    "projectWebsite": "https://submariner.io/",
+    "category": "Middleware",
+    "twitterHandle": "submarinerio",
+    "twitterURL": "https://twitter.com/submarinerio"
+  },		
   {
     "projectName": "SwitchYard",
     "projectDescription": "SwitchYard is a component-based development framework focused on building structured, maintainable services and applications",