add jest

server/package.json

@@ -6,7 +6,8 @@
   "scripts": {
     "build": "npx tsc",
     "start": "node dist/index.js",
-    "dev": "concurrently \"npx tsc --watch\" \"nodemon -q dist/index.js\""
+    "dev": "concurrently \"npx tsc --watch\" \"nodemon -q dist/index.js\"",
+    "test": "jest"
   },
   "dependencies": {
     "dotenv": "^16.0.1",
@@ -17,9 +18,13 @@
   },
   "devDependencies": {
     "@types/express": "^4.17.13",
+    "@types/jest": "^28.1.4",
     "@types/node": "^18.0.3",
     "concurrently": "^7.2.2",
+    "jest": "^28.1.2",
     "nodemon": "^2.0.19",
+    "ts-jest": "^28.0.5",
+    "ts-node": "^10.8.2",
     "typescript": "^4.7.4"
   }
 }