Close OSS self-host gaps: in-repo API docs, legal notes, and packaging.

Add MIT license and docs/api, strip SaaS status/admin remnants from robots and footer, align env/compose/README with payment-free product truth.

app/sitemap.ts

@@ -1,17 +1,27 @@
 import type { MetadataRoute } from "next";
 
-const SITE_URL = "https://songs2vid.com";
+function siteUrl() {
+  const raw = process.env.NEXTAUTH_URL?.trim() || "http://localhost:3000";
+  return raw.replace(/\/$/, "");
+}
 
 export default function sitemap(): MetadataRoute.Sitemap {
+  const base = siteUrl();
   return [
     {
-      url: SITE_URL,
+      url: base,
       lastModified: new Date(),
-      changeFrequency: "daily",
+      changeFrequency: "weekly",
       priority: 1.0,
     },
     {
-      url: `${SITE_URL}/privacy`,
+      url: `${base}/privacy`,
+      lastModified: new Date(),
+      changeFrequency: "monthly",
+      priority: 0.3,
+    },
+    {
+      url: `${base}/terms`,
       lastModified: new Date(),
       changeFrequency: "monthly",
       priority: 0.3,