migrates to flat config file

servers/lib/eslint.config.mjs

@@ -0,0 +1,52 @@
+import js from '@eslint/js';
+import typescript from '@typescript-eslint/eslint-plugin';
+import prettier from 'eslint-config-prettier';
+import airbnbBase from 'eslint-config-airbnb-base';
+import jest from 'eslint-plugin-jest';
+
+
+export default [
+    js.configs.recommended,
+    airbnbBase,
+    typescript.configs.recommended,
+    prettier,
+    {
+        files: ['**/*.js', '**/*.ts'],
+        languageOptions: {
+            ecmaVersion: 2022,
+            sourceType: 'module',
+        },
+        plugins: {
+            jest,
+            '@typescript-eslint': typescript,
+        },
+        rules: {
+            'import/no-extraneous-dependencies': ['error', { devDependencies: true }],
+            'no-console': 'error',
+            'import/first': 'error',
+            'linebreak-style': 0,
+            'import/no-unresolved': 'off',
+            'import/extensions': 'off',
+            'no-use-before-define': 'off',
+        },
+        settings: {
+            'import/resolver': {
+                node: {
+                    extensions: ['.js'],
+                },
+            },
+        },
+    },
+    {
+        files: ['**/*.ts'],
+        languageOptions: {
+            parser: '@typescript-eslint/parser',
+            parserOptions: {
+                project: ['./tsconfig.json'],
+            },
+        },
+    },
+    {
+        ignores: ['api/', 'build/', 'dist/', 'node_modules/', 'script/', 'src/types.ts'],
+    },
+];