test improvement

package.json

@@ -6,7 +6,9 @@
   "main": "dist/index.js",
   "scripts": {
     "build": "tsc",
-    "start": "node dist/index.js"
+    "start": "node dist/index.js",
+    "test": "vitest run",
+    "test:watch": "vitest"
   },
   "dependencies": {
     "fastify": "^5.0.0",
@@ -15,7 +17,8 @@
   },
   "devDependencies": {
     "@types/node": "^20.0.0",
-    "typescript": "^5.3.0"
+    "typescript": "^5.3.0",
+    "vitest": "^1.0.0"
   },
   "engines": {
     "node": ">=20.0.0"