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.

DOCKERHUB_OVERVIEW.md

@@ -2,7 +2,8 @@
 
 Payment-free, self-hosted software that turns cover art and audio into YouTube videos (FFmpeg + BullMQ). Full entitlements in every deployment — no plans, credits, Stripe, or paywall.
 
-**Image:** `atakanozban/songs2vid:latest`
+**Image:** `atakanozban/songs2vid:latest`  
+**License:** MIT
 
 **Docs:** https://docs.songs2vid.com  
 **Source:** https://git.atakanozban.com/Songs2VID/songs2vid  
@@ -21,12 +22,12 @@ Payment-free, self-hosted software that turns cover art and audio into YouTube v
 
 ```bash
 docker pull atakanozban/songs2vid:latest
-docker compose up -d --build
+docker compose up -d
 ```
 
 Open http://localhost:3000 → sign in with Google → dashboard.
 
-No Stripe or billing environment variables are required.
+No Stripe, billing, or edition environment variables are required. Watermarks are optional (no free-tier badge paywall).
 
 ## What you get
 
@@ -46,3 +47,4 @@ Next.js 15 · PostgreSQL/Prisma · Redis/BullMQ · NextAuth (Google + YouTube)
 - Getting started: https://docs.songs2vid.com/docs/getting-started
 - Environment variables: https://docs.songs2vid.com/docs/environment
 - REST API: https://docs.songs2vid.com/docs/api/overview
+- In-repo API notes: https://git.atakanozban.com/Songs2VID/songs2vid/src/branch/main/docs/api