SvelteKit config with custom Vite plugin

svelte.config.js

import adapter from '@sveltejs/adapter-netlify';
/** @type {import('@sveltejs/kit').Config} */
const config = {
    kit: {
        adapter: adapter(),
        vite: {
            plugins: [
                {
                    name: 'watch-content',
                    configureServer(server) {
                        server.watcher.add('./contentful/');
                    },
                    handleHotUpdate(ctx) {
                        if (ctx.file.includes('contentful')) {
                            console.log("Contentful update file was changed");
                            ctx.server.ws.send({
                                type: 'custom',
                                event: 'content-update',
                            });
                        }
                    },
                },
            ]
        },
    },

};

export default config;