chore(pr-deploy-site): migrate to flat config

apps/pr-deploy-site/eslint.config.js

@@ -0,0 +1,29 @@
+const js = require('@eslint/js');
+const sdl = require('@microsoft/eslint-plugin-sdl');
+const es = require('eslint-plugin-es');
+const { FlatCompat } = require('@eslint/eslintrc');
+
+const compat = new FlatCompat({
+  baseDirectory: __dirname,
+  recommendedConfig: js.configs.recommended,
+  allConfig: js.configs.all,
+});
+
+module.exports = [
+  ...compat.extends('plugin:@fluentui/eslint-plugin/node'),
+  ...sdl.configs.recommended,
+  {
+    files: ['**/pr-deploy-site.js'],
+    plugins: {
+      es,
+    },
+
+    rules: {
+      curly: 'off',
+      'no-var': 'off',
+      'vars-on-top': 'off',
+      'prefer-arrow-callback': 'off',
+      'no-restricted-globals': 'off',
+    },
+  },
+];

apps/pr-deploy-site/package.json

@@ -7,7 +7,7 @@
   "scripts": {
     "clean": "just-scripts clean",
     "generate:site": "just-scripts generate:site",
-    "lint": "ESLINT_USE_FLAT_CONFIG=false eslint --ext .js,.ts --cache .",
+    "lint": "eslint --cache .",
     "type-check": "tsc -p . --noEmit"
   },
   "license": "MIT",