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.

README.md

@@ -7,6 +7,8 @@ plans, credits, purchases, subscriptions, paywalls, or Stripe.
 Sign in with Google, open the dashboard, and create videos. Settings cover account,
 YouTube connection, and API keys only.
 
+**License:** [MIT](./LICENSE)
+
 ## Quick start (Docker)
 
 Published image: [`atakanozban/songs2vid:latest`](https://hub.docker.com/r/atakanozban/songs2vid)
@@ -23,15 +25,16 @@ Published image: [`atakanozban/songs2vid:latest`](https://hub.docker.com/r/ataka
 4. Start the stack (web + worker + Postgres + Redis):
 
 ```bash
-docker compose up -d --build
+docker compose up -d
 ```
 
-Or pull the published image and run Compose after pointing services at
-`atakanozban/songs2vid:latest` (same env and volumes).
+Compose uses the published image by default (`atakanozban/songs2vid:latest`) and can also
+build from this repo (`docker compose up -d --build`).
 
 Open http://localhost:3000 → sign in → dashboard.
 
-No Stripe keys or billing env vars are required.
+No Stripe keys, billing env vars, or edition flags are required. Watermarks are optional;
+OSS does not force a free-tier SaaS badge paywall.
 
 ## Features
 
@@ -42,6 +45,12 @@ No Stripe keys or billing env vars are required.
 - REST API for automation (keys under **Dashboard → Settings → API key**)
 - Always-on self-hosted entitlements (no quota paywall)
 
+## API documentation
+
+- In-repo: [docs/api/overview.md](./docs/api/overview.md) and [docs/api/endpoints.md](./docs/api/endpoints.md)
+- Live site: [docs.songs2vid.com/docs/api/overview](https://docs.songs2vid.com/docs/api/overview)
+- Machine-readable discovery: `GET /api/v1` (no auth; no billing routes)
+
 ## Local development
 
 ```bash
@@ -55,6 +64,17 @@ npm run dev:all
 - App: http://localhost:3000  
 - `dev:all` runs Next.js and the BullMQ worker
 
+## Environment
+
+See [`.env.example`](./.env.example) for the required and optional variables. Matching guide:
+[docs.songs2vid.com/docs/environment](https://docs.songs2vid.com/docs/environment).
+
+## Legal (self-hosted)
+
+In-app **Privacy** and **Terms** pages describe self-hosted responsibility: the operator of
+each instance controls data and access; this software does not process payments. They are not
+the paid cloud terms for [songs2vid.com](https://songs2vid.com).
+
 ## Stack
 
 - Next.js 15, TypeScript, Tailwind