In order to use the adapter you must setup the a few things.

• svelte.config.ts

Setup your Svelte config file to look like below. This will start of the HTTP server on the interafce a port specified, it will also handle CSP headers for prerendered files and set the base patht to be /base. Change as required.

This will also set up Svelte to add a CSP header for SSR generated HTML

import { vitePreprocess } from '@sveltejs/vite-plugin-svelte';
import adapter from '@bs-core/svelte-kit';
import { bs } from '@bs-core/shell';

const HTTP_IF = bs.getConfigStr('HTTP_IF');
const HTTP_PORT = bs.getConfigStr('HTTP_PORT');

/** @type {import('@sveltejs/kit').Config} */
const config = {
	// Consult https://svelte.dev/docs/kit/integrations
	// for more information about preprocessors
	preprocess: vitePreprocess(),

	kit: {
		adapter: adapter({
			networkInterface: HTTP_IF,
			networkPort: HTTP_PORT,
			staticFileServer: {
				cspHeader: {
					inlineScriptHashes: true
				}
			}
		}),
		paths: {
			base: '/base',
			relative: false
		},
		csp: {
			mode: 'auto',
			directives: {
				'script-src': ['self']
			}
		}
	}
};

export default config;

• vite.config.js

You Vite config file shold look like this to use the adapter in dev mode:

import { sveltekit } from '@sveltejs/kit/vite';
import { defineConfig } from 'vite';

import { viteDevPlugin } from '@bs-core/svelte-kit';

export default defineConfig({
	plugins: [sveltekit(), viteDevPlugin()]
});

• hooks.server.ts

If you have a backend and want to tie it up then set up an init hook for the server, something like below.

The convention is to put your backend code in the dir src/backend and to export an init function called start from a file called setup.ts NOTE: setup.ts gets complied to setup.js

What will happen here is when the server is started then the function setup will be called allowing you to setup your endpoints

import type { ServerInit } from '@sveltejs/kit';
import { start } from '$lib/server/backend/setup.js';

export const init: ServerInit = async () => {
	await start();
};