Added linting package

.eslintrc.json

@@ -0,0 +1,91 @@
+{
+    "globals": {},
+    "env": {
+        "commonjs": true,
+        "es2021": true,
+        "node": true
+    },
+    "extends": "eslint:recommended",
+    "parserOptions": {
+        "ecmaVersion": "latest"
+    },
+    "rules": {
+        "indent": [
+            "error",
+            "tab"
+        ],
+        "linebreak-style": [
+            "error",
+            "unix"
+        ],
+        "quotes": [
+            "error",
+            "single",
+            {
+                "allowTemplateLiterals": true
+            }
+        ],
+        "semi": [
+            "error",
+            "always"
+        ],
+	"no-unused-vars": [
+	    "error",
+            {
+                "vars": "local",
+		"argsIgnorePattern": "^_",
+		"varsIgnorePattern": "^_"
+            }
+	],
+	"max-len": [
+	    "error",
+	    {
+		"code": 80,
+		"tabWidth": 8
+	    }
+	],
+	"array-bracket-spacing": [
+		"error",
+		"always"
+	],
+	"object-curly-spacing": [
+		"error",
+		"always"
+	],
+	"no-extra-parens": [
+		"error"
+	],
+	"no-template-curly-in-string": [
+		"error"
+	],
+	"no-unreachable-loop": [
+		"error"
+	],
+	"block-scoped-var": [
+		"error"
+	],
+	"curly": [
+		"error",
+		"multi-or-nest",
+		"consistent"
+	],
+	"no-alert": [
+		"error"
+	],
+	"no-else-return": [
+		"error"
+	],
+	"no-empty-function": [
+		"error"
+	],
+	"no-self-compare": [
+		"error"
+	],
+	"no-useless-return": [
+		"error"
+	],
+	"brace-style": [
+		"error"
+	]
+    }
+}

package.json

@@ -19,5 +19,8 @@
   "dependencies": {
     "bcrypt": "^5.0.1",
     "mysql2": "^2.3.3"
+  },
+  "devDependencies": {
+    "eslint": "^8.6.0"
   }
 }