refactor

src/config/database.ts

@@ -0,0 +1,18 @@
+import { Pool } from 'pg';
+
+export const pool = new Pool({
+  user: 'postgres',
+  host: 'localhost',
+  database: 'kintone_license_server',
+  password: 'psadmin',
+  port: 5432,
+});
+
+pool.on('connect', () => {
+  console.log('Connected to PostgreSQL database');
+});
+
+pool.on('error', (err) => {
+  console.error('Unexpected error on idle client', err);
+  process.exit(-1);
+});