chore: initial import

server/db.js

@@ -0,0 +1,20 @@
+const { Pool } = require('pg');
+require('dotenv').config();
+
+const pool = new Pool({
+    user: process.env.DB_USER,
+    host: process.env.DB_HOST,
+    database: process.env.DB_DATABASE || process.env.DB_NAME,
+    password: String(process.env.DB_PASSWORD || ''),
+    port: process.env.DB_PORT,
+});
+
+// 监听连接池错误，防止空闲客户端错误导致程序崩溃
+pool.on('error', (err, client) => {
+    console.error('Unexpected error on idle client', err);
+});
+
+module.exports = {
+    query: (text, params) => pool.query(text, params),
+    pool
+};