add linter 💚

.eslintrc.json

@@ -0,0 +1,20 @@
+{
+	"extends": "eslint:recommended",
+	"env": {
+		"es2020": true,
+		"node": true
+	},
+	"ignorePatterns": [
+		"node_modules"
+	],
+	"rules": {
+        "no-unused-vars": [
+            "error",
+            {
+                "vars": "all",
+                "args": "none",
+                "ignoreRestSiblings": false
+            }
+        ]
+	}
+}

.github/workflows/test.yml

@@ -24,4 +24,5 @@ jobs:
         node-version: ${{ matrix.node-version }}
     - run: npm install
 
+    - run: npm run lint
     - run: npm test

package.json

@@ -33,8 +33,12 @@
 		"websocket-stream": "^5.1.1"
 	},
 	"scripts": {
+		"lint": "eslint .",
 		"start": "node server.js",
 		"test": "node test.js",
-		"prepublishOnly": "npm test"
+		"prepublishOnly": "npm run lint && npm test"
+	},
+	"devDependencies": {
+		"eslint": "^8.22.0"
 	}
 }