svelte: Use /svelte base path for now

Author: Turbo87

svelte/svelte.config.js

@@ -13,6 +13,11 @@ const config = {
       // avoid using `index.html` as a fallback page, so we use `200.html` instead.
       fallback: '200.html',
     }),
+    paths: {
+      // We are serving the app from the `/svelte` subdirectory for now
+      // to be able to serve it alongside the Ember.js app at `/`.
+      base: process.env.VITEST ? '' : '/svelte',
+    },
   },
 };