add option to set base path

src/routes/register/Register.svelte

@@ -2,6 +2,7 @@
 	import Select from '$lib/components/Input/Select.svelte';
 	import Input from '$lib/components/Input/Input.svelte';
 	import { createEventDispatcher, onMount } from 'svelte';
+	import { env } from '$env/dynamic/public';
 
 	const dispatch = createEventDispatcher();
 
@@ -37,7 +38,7 @@
 	async function sendRegister() {
 		// eslint-disable-next-line no-async-promise-executor
 		registerRequest = new Promise(async (resolve, reject) => {
-			const response = await fetch('/register', {
+			const response = await fetch(`${env.PUBLIC_BASE_PATH}/register`, {
 				method: 'POST',
 				body: new FormData(document.forms[0])
 			});
@@ -171,7 +172,8 @@
 				bind:inputElement={rulesInput}
 			/>
 			<label for="rules">
-				Ich bin mit den <a class="link" href="/rules">Regeln</a> einverstanden und achte sie
+				Ich bin mit den <a class="link" href="{env.PUBLIC_BASE_PATH}/rules">Regeln</a> einverstanden
+				und achte sie
 				<span class="text-red-700">*</span>
 				<br />
 				<p class="text-[.75rem]">