chore: add nextjs template

frontend-nextjs/lib/db.ts

@@ -0,0 +1,29 @@
+import { Pool } from "pg";
+
+// Singleton database connection pool
+// Uses environment variables for configuration
+
+const pool = new Pool({
+  host: process.env.DB_HOST || "127.0.0.1",
+  port: parseInt(process.env.DB_PORT || "5432"),
+  user: process.env.DB_USER || "myuser",
+  password: process.env.DB_PASSWORD || "mypassword",
+  database: process.env.DB_DATABASE || "mydb",
+});
+
+export default pool;
+
+// Helper function for queries
+export async function query<T>(text: string, params?: unknown[]): Promise<T[]> {
+  const result = await pool.query(text, params);
+  return result.rows as T[];
+}
+
+// Helper function for single row
+export async function queryOne<T>(
+  text: string,
+  params?: unknown[]
+): Promise<T | null> {
+  const result = await pool.query(text, params);
+  return result.rows[0] as T | null;
+}