add lint

.eslintrc.js

+module.exports = {
+    "env": {
+        "browser": true,
+        "es6": true
+    },
+    "extends": [
+        "eslint:recommended",
+        "plugin:react/recommended"
+    ],
+    "globals": {
+        "Atomics": "readonly",
+        "SharedArrayBuffer": "readonly"
+    },
+    "parserOptions": {
+        "ecmaFeatures": {
+            "jsx": true
+        },
+        "ecmaVersion": 2018,
+        "sourceType": "module"
+    },
+    "plugins": [
+        "react"
+    ],
+    "rules": {
+    }
+};
\ No newline at end of file

package.json

@@ -20,6 +20,8 @@
     "mysql": "^2.17.1"
   },
   "devDependencies": {
+    "eslint": "^6.7.0",
+    "eslint-plugin-react": "^7.16.0",
     "nodemon": "^1.19.4"
   }
 }