docs: add subscription features, pricing tiers, API keys, and getting started sections to README

README.md

@@ -2,6 +2,55 @@
 
 Codebase → Onboarding Docs Generator. Paste a GitHub repo URL, get interactive developer onboarding documentation in minutes.
 
+**Live at [codeboard.vectry.tech](https://codeboard.vectry.tech)**
+
+## Getting Started
+
+1. **Register** at [codeboard.vectry.tech/register](https://codeboard.vectry.tech/register) with your email and password.
+2. **Log in** to access the dashboard, generation history, and settings.
+3. **Paste a GitHub URL** and generate interactive onboarding documentation.
+
+Registration is required for full access. Unauthenticated visitors can view the landing page, but generating documentation, viewing your dashboard, and browsing generation history all require a logged-in account.
+
+## Plans and Pricing
+
+CodeBoard offers three billing tiers. One generation equals one documentation build from a repository URL.
+
+| Plan | Price | Generations | Highlights |
+|------|-------|-------------|------------|
+| **Free** | $0 | 15 per day | Public repos, architecture diagrams, interactive docs |
+| **Starter** | $5 / month | 1,000 per month | Generation history, API key access, priority support |
+| **Pro** | $20 / month | 100,000 per month | Full history, multiple API keys, dedicated support, custom integrations |
+
+Manage your subscription in **Settings > Billing** from the dashboard.
+
+## API Keys (Programmatic Access)
+
+Paid plans (Starter and Pro) include API key access for programmatic diagram and documentation generation.
+
+1. Navigate to **Settings > API Keys** in the dashboard.
+2. Create a new key and copy it immediately -- it is shown only once.
+3. Include the key in your requests:
+
+```bash
+curl -X POST https://codeboard.vectry.tech/api/generate \
+  -H "Authorization: Bearer YOUR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"repoUrl": "https://github.com/owner/repo"}'
+```
+
+Each successful API call counts as one generation against your plan's quota.
+
+## Generation History
+
+All generated documentation is saved to your account. From the dashboard you can:
+
+- Browse past generations per repository.
+- Compare documentation versions side-by-side to track codebase changes over time.
+- Re-open any previous generation by its unique link.
+
+History is per-user -- each account maintains its own generation records.
+
 ## Architecture
 
 ```