Switch hydrogen BI to ledger data source

src/server/hydrogen-db.ts

@@ -0,0 +1,17 @@
+import mysql from 'mysql2/promise';
+import dotenv from 'dotenv';
+
+dotenv.config();
+
+const hydrogenPool = mysql.createPool({
+  host: process.env.HYDROGEN_DB_HOST || '47.99.185.173',
+  port: Number(process.env.HYDROGEN_DB_PORT) || 3306,
+  user: process.env.HYDROGEN_DB_USER || 'root',
+  password: process.env.HYDROGEN_DB_PASSWORD || 'lnMysql.',
+  database: process.env.HYDROGEN_DB_NAME || 'ln_asset_management',
+  waitForConnections: true,
+  connectionLimit: 5,
+  queueLimit: 0,
+});
+
+export default hydrogenPool;