Add eslint

Signed-off-by: Fred Boniface <fred@fjla.uk>

.eslintrc.js

@@ -0,0 +1,31 @@
+module.exports = {
+    'env': {
+        'browser': true,
+        'commonjs': true,
+        'es2021': true
+    },
+    'extends': 'eslint:recommended',
+    'overrides': [
+    ],
+    'parserOptions': {
+        'ecmaVersion': 'latest'
+    },
+    'rules': {
+        'indent': [
+            'error',
+            4
+        ],
+        'linebreak-style': [
+            'error',
+            'unix'
+        ],
+        'quotes': [
+            'error',
+            'single'
+        ],
+        'semi': [
+            'error',
+            'never'
+        ]
+    }
+}

package.json

@@ -23,5 +23,8 @@
     "url": "https://git.fjla.uk/owlboard/backend.git"
   },
   "author": "Fred Boniface",
-  "license": "GPL-3.0-or-later"
+  "license": "GPL-3.0-or-later",
+  "devDependencies": {
+    "eslint": "^8.39.0"
+  }
 }