add postman collections file

ddd.postman_collection.json

@@ -0,0 +1,40 @@
+{
+	"info": {
+		"_postman_id": "6d21917e-ffb7-4d21-a4b8-f84be40a9872",
+		"name": "ddd",
+		"schema": "https://schema.getpostman.com/json/collection/v2.1.0/collection.json",
+		"_exporter_id": "14524570"
+	},
+	"item": [
+		{
+			"name": "submitOrder",
+			"request": {
+				"method": "POST",
+				"header": [],
+				"body": {
+					"mode": "raw",
+					"raw": "{\r\n    \"content\": \"Dummy Order\",\r\n    \"user\": 1,\r\n    \"order\": {\r\n        \"lineItems\": [\r\n            {\r\n                \"product\": 1,\r\n                \"quantity\": 5\r\n            },{\r\n                \"product\": 2,\r\n                \"quantity\": 3\r\n            }\r\n        ],\r\n        \"payment\": 1500.5\r\n    }\r\n}",
+					"options": {
+						"raw": {
+							"language": "json"
+						}
+					}
+				},
+				"url": {
+					"raw": "http://localhost:8081/v1/orders/submitOrder",
+					"protocol": "http",
+					"host": [
+						"localhost"
+					],
+					"port": "8081",
+					"path": [
+						"v1",
+						"orders",
+						"submitOrder"
+					]
+				}
+			},
+			"response": []
+		}
+	]
+}