Add Postman environment and collection files for API testing

Author: AminaSaoudi

.github/workflows/postman-tests.yml

@@ -0,0 +1,16 @@
+{
+	"id": "948eb399-1516-447a-b963-e262b57a6725",
+	"name": "Development",
+	"values": [
+		{
+			"key": "baseUrl",
+			"value": "",
+			"type": "default",
+			"enabled": true
+		}
+	],
+	"color": null,
+	"_postman_variable_scope": "environment",
+	"_postman_exported_at": "2025-11-21T12:10:19.553Z",
+	"_postman_exported_using": "Postman/11.72.8"
+}

postman/Development.postman_environment.json

@@ -0,0 +1,28 @@
+{
+	"info": {
+		"_postman_id": "35183f5f-9559-48a2-ad97-705822ec8e01",
+		"name": "JSONPlaceholder API Contract Tests",
+		"schema": "https://schema.getpostman.com/json/collection/v2.1.0/collection.json",
+		"_exporter_id": "50210709",
+		"_collection_link": "https://www.postman.com/saoudiam-97-2155897/workspace/jsonplaceholder-api-tests/collection/50210709-35183f5f-9559-48a2-ad97-705822ec8e01?action=share&source=collection_link&creator=50210709"
+	},
+	"item": [
+		{
+			"name": "GET All Posts (Health Check)",
+			"request": {
+				"method": "GET",
+				"header": [],
+				"url": {
+					"raw": "{{baseUrl}}/posts",
+					"host": [
+						"{{baseUrl}}"
+					],
+					"path": [
+						"posts"
+					]
+				}
+			},
+			"response": []
+		}
+	]
+}