[DOC] Show an example of creating an ingress

Something nearly everyone actually does, an is actually quite painful if you're not used to typescript or how kubeConfig works.

Author: FossPrime

examples/ingress.js

@@ -0,0 +1,53 @@
+const k8s = require('@kubernetes/client-node')
+const kc = new k8s.KubeConfig()
+kc.loadFromDefault()
+
+// Using apiVersion networking.k8s.io/v1beta1, for versions before 1.14 use extensions/v1beta1
+const k8sApi = kc.makeApiClient(k8s.NetworkingV1beta1Api)
+
+function createIngress(clientIdentifier) {
+  return {
+    apiVersions: 'networking.k8s.io/v1beta1',
+    kind: 'Ingress',
+    metadata: {
+      name: `production-custom-${clientIdentifier}`,
+      namespace: 'default'
+    },
+    spec: {
+      rules: [
+        {
+          name: `production-custom-${clientIdentifier}`,
+          host: `${clientIdentifier}.example.com`,
+          http: {
+            paths: [
+              {
+                backend: {
+                  serviceName: 'production-auto-deploy',
+                  servicePort: 5000
+                },
+                path: '/'
+              }
+            ]
+          }
+        }
+      ],
+      tls: [
+        {
+          hosts: [`${clientIdentifier}.example.com`]
+        }
+      ]
+    },
+  }
+}
+
+function main () {
+  const clientIdentifier = 'poop'
+  const ingress = createIngress(clientIdentifier)
+  k8sApi.createNamespacedIngress('default', ingress)
+    .then(() => console.log('Success'))
+    .catch(e => {
+      console.log(e)
+    })
+}
+
+main()