Hey guys, title could have been better, but I am basically trying to setup an XML product feed for my store, which has 20k+ products including variants, and it constantly grows and shrinks throughout each day. I want the feed to rerun every 15 minutes, and I want to host this on vercel. I am worried about serverles costs since this is a function, below is my code with my approach I am doing caching, is this the most efficient way to handle this to reduce costs in Vercel? Is serverless (vercel) hosting bad for this use case?

// app/api/product-feed/route.ts

import { NextResponse } from 'next/server';
import { kv } from '@vercel/kv';
import { BigCommerceClient } from './bigcommerce-client';
import { generateXMLFeed } from './xml-generator';

const CACHE_KEY = 'product-feed-cache';
const CACHE_TTL = 15 * 60; // 15 minutes in seconds

export async function GET() {
  try {
    // Check cache first
    const cachedFeed = await kv.get(CACHE_KEY);
    if (cachedFeed) {
      return new NextResponse(cachedFeed, {
        headers: { 'Content-Type': 'application/xml' },
      });
    }

    // If not in cache, generate new feed
    const client = new BigCommerceClient();
    const products = await client.getAllProducts();
    const xmlFeed = generateXMLFeed(products);

    // Cache the new feed
    await kv.set(CACHE_KEY, xmlFeed, { ex: CACHE_TTL });

    return new NextResponse(xmlFeed, {
      headers: { 'Content-Type': 'application/xml' },
    });
  } catch (error) {
    console.error('Error generating product feed:', error);
    return new NextResponse('Error generating product feed', { status: 500 });
  }
}

// Scheduled job to update cache (run every 15 minutes)
export async function POST() {
  try {
    const client = new BigCommerceClient();
    const products = await client.getAllProducts();
    const xmlFeed = generateXMLFeed(products);
    await kv.set(CACHE_KEY, xmlFeed, { ex: CACHE_TTL });
    return new NextResponse('Cache updated successfully', { status: 200 });
  } catch (error) {
    console.error('Error updating cache:', error);
    return new NextResponse('Error updating cache', { status: 500 });
  }
}

Then I would setup a cron job in vercel