added fallback route to server, created extensive setup instructions in docs

app/src/adapter/vite/vite.adapter.ts

@@ -1,24 +1,40 @@
 import { serveStatic } from "@hono/node-server/serve-static";
 import { type RuntimeBkndConfig, createRuntimeApp } from "adapter";
-import type { CreateAppConfig } from "bknd";
 import type { App } from "bknd";
 
-export type ViteBkndConfig<Env = any> = RuntimeBkndConfig & {
-   app: CreateAppConfig | ((env: Env) => CreateAppConfig);
+export type ViteBkndConfig<Env = any> = RuntimeBkndConfig<Env> & {
    setAdminHtml?: boolean;
    forceDev?: boolean;
    html?: string;
 };
 
-async function createApp(config: ViteBkndConfig, env: any) {
-   const create_config = typeof config.app === "function" ? config.app(env) : config.app;
-   return await createRuntimeApp({
-      ...create_config,
-      adminOptions: config.setAdminHtml
-         ? { html: config.html, forceDev: config.forceDev }
-         : undefined,
-      serveStatic: ["/assets/*", serveStatic({ root: config.distPath ?? "./" })]
-   });
+export function addViteScript(html: string, addBkndContext: boolean = true) {
+   return html.replace(
+      "</head>",
+      `<script type="module">
+import RefreshRuntime from "/@react-refresh"
+RefreshRuntime.injectIntoGlobalHook(window)
+window.$RefreshReg$ = () => {}
+window.$RefreshSig$ = () => (type) => type
+window.__vite_plugin_react_preamble_installed__ = true
+</script>
+<script type="module" src="/@vite/client"></script>
+${addBkndContext ? "<!-- BKND_CONTEXT -->" : ""}
+</head>`
+   );
+}
+
+async function createApp(config: ViteBkndConfig, env?: any) {
+   return await createRuntimeApp(
+      {
+         ...config,
+         adminOptions: config.setAdminHtml
+            ? { html: config.html, forceDev: config.forceDev }
+            : undefined,
+         serveStatic: ["/assets/*", serveStatic({ root: config.distPath ?? "./" })]
+      },
+      env
+   );
 }
 
 export async function serveFresh(config: ViteBkndConfig) {