Add logging for SQL execution and database host in query function

src/db.js

@@ -12,6 +12,9 @@ const pool = mysql.createPool({
 });
 
 export async function query(sql, params = []) {
+  console.log('Executing SQL:', sql, 'with params:', params);
+  console.log('Database Host:', process.env.DB_HOST);
+
   const [rows] = await pool.execute(sql, params);
   return rows;
 }