Add comments for magic 31234 port

Also delete hack/lib/kind-config/multi-node.yaml since we don't think we will
use it...

Signed-off-by: Andrew Keesler <akeesler@vmware.com>

hack/lib/kind-config/multi-node.yaml

@@ -1,15 +0,0 @@
-kind: Cluster
-apiVersion: kind.x-k8s.io/v1alpha4
-nodes:
-  - role: control-plane
-  - role: worker
-  - role: worker
-    extraPortMappings:
-      - protocol: TCP
-        containerPort: 31234
-        hostPort: 12345
-        listenAddress: 127.0.0.1
-      - protocol: TCP
-        containerPort: 31235
-        hostPort: 12346
-        listenAddress: 127.0.0.1

hack/lib/kind-config/single-node.yaml

@@ -4,10 +4,16 @@ nodes:
   - role: control-plane
     extraPortMappings:
     - protocol: TCP
+      # This same port number is hardcoded in the integration test setup
+      # when creating a Service on a kind cluster. It is used to talk to
+      # the supervisor app.
       containerPort: 31234
       hostPort: 12345
       listenAddress: 127.0.0.1
     - protocol: TCP
+      # This same port number is hardcoded in the integration test setup
+      # when creating a Service on a kind cluster. It is used to talk to
+      # the Dex app.
       containerPort: 31235
       hostPort: 12346
       listenAddress: 127.0.0.1

hack/lib/tilt/Tiltfile

@@ -85,6 +85,9 @@ docker_build_with_restart('image/supervisor', '.',
 )
 
 # Render the supervisor installation manifest using ytt.
+#
+# 31234 is the same port number hardcoded in the port forwarding of our kind configuration.
+# Don't think that you can just change this!
 k8s_yaml(local([
     'ytt',
     '--file', '../../../deploy/supervisor',