新增learn-kubernetes（https://github.com/yyong-brs/learn-kubernetes）相关文件

learn/learn-kubernetes-master/kiamol/ch21/functions/todo-api/ingress/ingress.yaml

@@ -0,0 +1,20 @@
+apiVersion: networking.k8s.io/v1beta1 
+kind: Ingress
+metadata:
+  name: todo-api
+  labels:
+    kiamol: ch21
+spec:
+  rules:
+  - host: api.todo.kiamol.local
+    http:
+      paths:
+      - path: /todos
+        backend:
+          serviceName: todo-api
+          servicePort: 8080
+
+# this spec is equivalent to running 
+# kubeless trigger http create todo-api --function-name todo-api --path todos --hostname api.todo.kiamol.local
+# but that fails with Kubeless 1.0.7 running on Kubernetes 1.18 - see
+# https://github.com/kubeless/kubeless/issues/1130