Fix minor issues

package.json

@@ -9,6 +9,7 @@
   },
   "author": "Bartłomiej Pluta <noreply.git@mx.bartlomiejpluta.com>",
   "license": "ISC",
+  "type": "module",
   "bin": {
     "actual-importer": "./dist/index.js"
   },

src/server/index.ts

@@ -1,4 +1,4 @@
-const { mkdir } = require('node:fs/promises');
+import { mkdir } from 'node:fs/promises';
 import * as api from "@actual-app/api";
 import { ServerConfig } from "@/types/config";
 import { Transaction } from "@/types/transaction";

tsconfig.json

@@ -1,24 +1,32 @@
 {
   "compilerOptions": {
     "target": "ES2023",
-    "module": "commonjs",
+    "module": "ESNext",
+    "moduleResolution": "Node",
     "outDir": "./dist",
     "rootDir": "./src",
     "allowJs": true,
     "strict": true,
     "esModuleInterop": true,
     "skipLibCheck": true,
+    
     "typeRoots": [
       "./src/types",
       "./node_modules/@types"
     ],
+
     "paths": {
       "@/*": ["./src/*"],
-    }
+    },
   },
+
   "include": ["src/**/*"],  
   "exclude": [
     "node_modules",
     "src/types"
-  ]
+  ],
+
+  "ts-node": {
+    "esm": true
+  }
 }