Added eslint config

.eslintrc.js

@@ -0,0 +1,37 @@
+module.exports = {
+	'env': {
+		'browser': true,
+		'es6': true,
+		'node': true,
+	},
+	'extends': 'eslint:recommended',
+	'globals': {
+		'Atomics': 'readonly',
+		'SharedArrayBuffer': 'readonly'
+	},
+	'parserOptions': {
+		'ecmaVersion': 2018,
+		"ecmaFeatures": {
+			"jsx": true,
+	    },
+	},
+	'rules': {
+		'indent': [
+			'error',
+			'tab'
+		],
+		'linebreak-style': [
+			'error',
+			'unix'
+		],
+		'quotes': [
+			'error',
+			'single'
+		],
+		"react/jsx-uses-react": "error",
+		"react/jsx-uses-vars": "error",
+	},
+	"plugins": [
+		"react",
+	],
+};

package.json

@@ -0,0 +1,14 @@
+{
+  "name": "joplin",
+  "version": "1.0.0",
+  "description": "[![Donate](https://joplinapp.org/images/badges/Donate-PayPal-green.svg)](https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=E8JMYD2LQ8MMA&lc=GB&item_name=Joplin+Development&currency_code=EUR&bn=PP%2dDonationsBF%3abtn_donateCC_LG%2egif%3aNonHosted) [![Become a patron](https://joplinapp.org/images/badges/Patreon-Badge.svg)](https://www.patreon.com/joplin)",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/laurent22/joplin.git"
+  },
+  "license": "MIT",
+  "devDependencies": {
+    "eslint": "^6.1.0",
+    "eslint-plugin-react": "^7.14.3"
+  }
+}