Set up CI with ESLint linter and Mocha test runner (#661)

package.json

@@ -7,6 +7,7 @@
   },
   "scripts": {
     "test": "mocha --reporter spec",
+    "lint": "eslint .",
     "start": "node --inspect=5858 -r ts-node/register ./src/server/index.ts",
     "dev": "nodemon --transpile-only ./src/server/index.ts",
     "build": "rm -rf build && tsc && gulp",
@@ -73,6 +74,7 @@
     "unzip-stream": "^0.3.1"
   },
   "devDependencies": {
+    "@eslint/js": "^10.0.1",
     "@types/archiver": "^5.3.4",
     "@types/compression": "^1.7.5",
     "@types/crypto-js": "^4.2.2",
@@ -88,6 +90,7 @@
     "@types/passport-github2": "^1.2.9",
     "@types/unzip-stream": "^0.3.4",
     "chai": "^4.5.0",
+    "eslint": "^10.2.0",
     "gulp": "^5.0.0",
     "gulp-clean-css": "^4.3.0",
     "gulp-concat": "^2.6.1",
@@ -97,7 +100,8 @@
     "mocha": "^10.4.0",
     "nodemon": "^3.1.0",
     "ts-node": "^10.9.2",
-    "typescript": "^5.4.3"
+    "typescript": "^5.4.3",
+    "typescript-eslint": "^8.58.2"
   },
   "nodemonConfig": {
     "ignore": [