Update to NextJS 16

eslint.config.mjs

@@ -1,16 +1,18 @@
-import { dirname } from 'path'
-import { fileURLToPath } from 'url'
-import { FlatCompat } from '@eslint/eslintrc'
+import { defineConfig, globalIgnores } from 'eslint/config'
+import nextVitals from 'eslint-config-next/core-web-vitals'
+import nextTs from 'eslint-config-next/typescript'
 
-const __filename = fileURLToPath(import.meta.url)
-const __dirname = dirname(__filename)
+const eslintConfig = defineConfig([
+  ...nextVitals,
+  ...nextTs,
+  // Override default ignores of eslint-config-next.
+  globalIgnores([
+    // Default ignores of eslint-config-next:
+    '.next/**',
+    'out/**',
+    'build/**',
+    'next-env.d.ts'
+  ])
+])
 
-const compat = new FlatCompat({
-  baseDirectory: __dirname
-})
-
-const eslintConfig = [
-  ...compat.extends('next/core-web-vitals', 'next/typescript')
-]
-
-export default eslintConfig
+export default eslintConfig