Added request to Postman collection

ContactsAPI.postman_collection.json

@@ -129,6 +129,28 @@
 				}
 			},
 			"response": []
+		},
+		{
+			"name": "Get single contact by ID",
+			"request": {
+				"method": "GET",
+				"header": [],
+				"url": {
+					"raw": "localhost:8080/api/v1/contacts/1",
+					"host": [
+						"localhost"
+					],
+					"port": "8080",
+					"path": [
+						"api",
+						"v1",
+						"contacts",
+						"1"
+					]
+				},
+				"description": "Modify the ID, in this case '1', at the end of the URL to the desired contact ID."
+			},
+			"response": []
 		}
 	]
 }