Update esllint and other dev dependencies

server/app.js

@@ -25,13 +25,13 @@ if (nconf.get('help')) {
     '--config       Path to a JSON/yaml configuration file that will replace default config.'
   );
   console.log('--version        The version number.');
-  // eslint-disable-next-line unicorn/no-process-exit
+
   process.exit();
 }
 
 if (nconf.get('version')) {
   console.log(version);
-  // eslint-disable-next-line unicorn/no-process-exit
+
   process.exit();
 }
 
@@ -55,7 +55,7 @@ try {
   nconf.defaults(configFromFile);
 } catch (error) {
   console.error('Error reading configuration file:', error);
-  // eslint-disable-next-line unicorn/no-process-exit
+
   process.exit(1);
 }
 

server/eslint.config.mjs

@@ -0,0 +1,53 @@
+import prettier from 'eslint-plugin-prettier';
+import unicorn from 'eslint-plugin-unicorn';
+import globals from 'globals';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+import js from '@eslint/js';
+import { FlatCompat } from '@eslint/eslintrc';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const compat = new FlatCompat({
+  baseDirectory: __dirname,
+  recommendedConfig: js.configs.recommended,
+  allConfig: js.configs.all
+});
+
+export default [
+  {
+    ignores: ['config/*', 'public/**/*']
+  },
+  ...compat.extends('eslint:recommended', 'plugin:unicorn/recommended'),
+  {
+    plugins: {
+      prettier,
+      unicorn
+    },
+
+    languageOptions: {
+      globals: {
+        ...globals.node
+      },
+
+      ecmaVersion: 'latest',
+      sourceType: 'module'
+    },
+
+    rules: {
+      'prettier/prettier': [
+        'error',
+        {
+          singleQuote: true,
+          trailingComma: 'none',
+          arrowParens: 'avoid',
+          embeddedLanguageFormatting: 'off'
+        }
+      ],
+
+      'require-atomic-updates': 0,
+      'no-extra-semi': 0,
+      'no-mixed-spaces-and-tabs': 0
+    }
+  }
+];