Single part at the root, COMPOSE_FILE in .env

template/{{ part_dir }}/vite.config.ts

@@ -0,0 +1,15 @@
+import { sveltekit } from "@sveltejs/kit/vite";
+import tailwindcss from "@tailwindcss/vite";
+import { defineConfig } from "vite";
+
+export default defineConfig({
+  plugins: [tailwindcss(), sveltekit()],
+  server: {
+    proxy: {
+      "/api": {
+        changeOrigin: true,
+        target: process.env.API_PROXY_TARGET ?? "http://localhost:8080",
+      },
+    },
+  },
+});