Add eslint and prettier configuration and dependencies

node/.eslintrc

@@ -0,0 +1,25 @@
+{
+  "extends": ["eslint:recommended", "eslint-config-prettier"],
+  "env": {
+    "node": true
+  },
+  "parserOptions": {
+    "ecmaVersion": 10
+  },
+  "plugins": ["prettier"],
+  "rules": {
+    "no-constant-condition": "off",
+    "no-dupe-else-if": "off",
+    "no-empty": "warn",
+    "no-inner-declarations": "warn",
+    "no-unreachable": "warn",
+    "no-undef": "warn",
+    "no-unused-vars": "warn",
+    "no-redeclare": "warn",
+    "curly": "error",
+    "indent": ["error", 2],
+    "prettier/prettier": "error",
+    "one-var": ["error", "never"],
+    "no-sequences": "error"
+  }
+}

node/.prettierrc

@@ -0,0 +1,9 @@
+{
+  "tabWidth": 2,
+  "singleQuote": false,
+  "printWidth": 120,
+  "trailingComma": "all",
+  "semi": true,
+  "bracketSpacing": true,
+  "arrowParens": "always"
+}

node/package.json

@@ -5,15 +5,27 @@
   "main": "server.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
-    "start": "node server.js EU I 8120"
+    "start": "node server.js EU I 8120",
+    "lint": "eslint --ext .js .",
+    "lint:fix": "eslint --fix --ext .js ."
   },
   "author": "",
   "license": "AdventureLandOnlyUse",
   "dependencies": {
-    "socket.io": "^4.0.0",
-    "request": "^2.88.2",
-    "range_check": "^1.4.0",
+    "bytebuffer": "^5.0.1",
     "protobufjs": "^6.9.0",
-    "bytebuffer": "^5.0.1"
-  }
-}
+    "range_check": "^1.4.0",
+    "request": "^2.88.2",
+    "socket.io": "^4.0.0"
+  },
+  "devDependencies": {
+    "eslint": "^8.52.0",
+    "eslint-config-prettier": "^9.0.0",
+    "eslint-plugin-prettier": "^5.0.1",
+    "prettier": "^3.0.3"
+  },
+  "eslintIgnore": [
+    "node_modules/*",
+    "data.js"
+  ]
+}