chore: added Helmet

package.json

@@ -27,6 +27,7 @@
     "body-parser": "^1.20.2",
     "cors": "^2.8.5",
     "express": "^4.18.2",
+    "helmet": "^7.0.0",
     "jsonschema": "^1.4.1"
   },
   "devDependencies": {

src/server/server.ts

@@ -1,6 +1,7 @@
 import * as bodyParser from 'body-parser';
 import cors from 'cors';
 import express, { Request, Response } from 'express';
+import helmet from 'helmet';
 import { Validator } from 'jsonschema';
 import { addition } from '../utils/addition';
 
@@ -8,6 +9,7 @@ const server = express();
 server.use(cors());
 server.use(express.json());
 server.use(bodyParser.json());
+server.use(helmet());
 
 const validator = new Validator();
 const schema = {

yarn.lock

@@ -2544,6 +2544,11 @@ has@^1.0.3:
   dependencies:
     function-bind "^1.1.1"
 
+helmet@^7.0.0:
+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/helmet/-/helmet-7.0.0.tgz#ac3011ba82fa2467f58075afa58a49427ba6212d"
+  integrity sha512-MsIgYmdBh460ZZ8cJC81q4XJknjG567wzEmv46WOBblDb6TUd3z8/GhgmsM9pn8g2B80tAJ4m5/d3Bi1KrSUBQ==
+
 hexoid@^1.0.0:
   version "1.0.0"
   resolved "https://registry.npmjs.org/hexoid/-/hexoid-1.0.0.tgz"