Adding jest on the server process

server/package.json

@@ -4,7 +4,8 @@
   "description": "A WebRTC playroom",
   "main": "index.js",
   "scripts": {
-    "devel": "nodemon server.ts"
+    "devel": "nodemon server.ts",
+    "test": "jest"
   },
   "author": "Domenico Testa",
   "license": "MIT",
@@ -12,7 +13,7 @@
     "@colyseus/command": "^0.1.6",
     "@types/express": "^4.17.9",
     "@types/express-session": "^1.17.3",
-    "@types/jest": "^26.0.19",
+    "@types/jest": "^26.0.20",
     "@types/node": "^14.14.19",
     "colyseus": "^0.14.6",
     "ejs": "^3.1.5",
@@ -27,6 +28,12 @@
     "uuid": "^8.3.2"
   },
   "devDependencies": {
+    "@babel/core": "^7.12.16",
+    "@babel/plugin-proposal-decorators": "^7.12.13",
+    "@babel/preset-env": "^7.12.16",
+    "@babel/preset-typescript": "^7.12.16",
+    "babel-jest": "^26.6.3",
+    "jest": "^26.6.3",
     "nodemon": "^2.0.6"
   }
 }