update readme

README.md

@@ -30,4 +30,39 @@ npm install
 npx cdk@0.36.1 bootstrap
 npx cdk@0.36.1 deploy  --require-approval never  "*"
 
+```
+
+## Test the app:
+This is a spring boot CRUD app with RDS (mysql).
+
+```
+# use httpie to POST to ALB endpoint / api/notes , eg:
+
+http POST sprin-sprin-????????????.ap-southeast-1.elb.amazonaws.com/api/notes title="title 2" content="sample content"
+
+# view the list of notes :
+
+http sprin-sprin-????????????.ap-southeast-1.elb.amazonaws.com/api/notes
+
+      Connection: keep-alive
+      Content-Type: application/json;charset=UTF-8
+      Date: Mon, 08 Jul 2019 06:15:10 GMT
+      Transfer-Encoding: chunked
+
+      [
+          {
+              "content": "aa",
+              "createdAt": "2019-07-08T06:10:41.000+0000",
+              "id": 1,
+              "title": "title1",
+              "updatedAt": "2019-07-08T06:10:41.000+0000"
+          },
+          {
+              "content": "sample content",
+              "createdAt": "2019-07-08T06:14:28.000+0000",
+              "id": 2,
+              "title": "title 2",
+              "updatedAt": "2019-07-08T06:14:28.000+0000"
+          }
+      ]
 ```