added backend functionality

backend/email.js

@@ -0,0 +1,45 @@
+const nodemailer = require("nodemailer");
+const fs = require("fs");
+const path = require("path");
+require("dotenv").config();
+
+/* ---------- TRANSPORTER ---------- */
+const transporter = nodemailer.createTransport({
+  host: process.env.SMTP_HOST,
+  port: process.env.SMTP_PORT,
+  secure: false,
+  auth: {
+    user: process.env.SMTP_USER,
+    pass: process.env.SMTP_PASS,
+  },
+});
+
+/* ---------- SEND EMAIL ---------- */
+async function sendConfirmationEmail(to, teamName) {
+  try {
+    const templatePath = path.join(
+      __dirname,
+      "templates",
+      "email.html"
+    );
+
+    let html = fs.readFileSync(templatePath, "utf-8");
+
+    // Replace placeholders
+    html = html.replace(/{{TEAM_NAME}}/g, teamName);
+
+    await transporter.sendMail({
+      from: `"Hackathon Team" <${process.env.SMTP_USER}>`,
+      to,
+      subject: "Hackathon Registration Confirmation",
+      html,
+    });
+
+    console.log("✔ Confirmation email sent to:", to);
+  } catch (err) {
+    console.error("❌ Email sending failed:", err);
+    throw err;
+  }
+}
+
+module.exports = { sendConfirmationEmail };