feat: add linting

.eslintrc.js

@@ -0,0 +1,14 @@
+module.exports = {
+  env: {
+    node: true,
+  },
+  extends: ["eslint:recommended", "plugin:prettier/recommended"],
+  parserOptions: {
+    ecmaVersion: "latest",
+    sourceType: "module",
+  },
+  ignorePatterns: ["!.eleventy.js"],
+  rules: {
+    "prettier/prettier": "error",
+  },
+};