Add README files for various applications: Decidim, Discourse, Example Admin, Example App, Ghost, Immich, Keila, Lemmy, Listmonk, Loomio, Matrix, Memcached, MySQL, Open WebUI, OpenProject, PostgreSQL, Redis, and vLLM

ghost/README.md

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+# Ghost
+
+Ghost is a powerful app for new-media creators to publish, share, and grow a business around their content. It provides a clean writing experience with built-in membership and subscription features.
+
+## Dependencies
+
+- **MySQL** - Database for storing content and configuration
+
+## Configuration
+
+Key settings configured through your instance's `config.yaml`:
+
+- **domain** - Where Ghost will be accessible (default: `ghost.{your-cloud-domain}`)
+- **blogTitle** - Your blog's title (default: `My Blog`)
+- **adminEmail** - Admin account email (defaults to your operator email)
+- **storage** - Persistent volume size for content (default: `10Gi`)
+- **SMTP** - Email delivery settings inherited from your Wild Cloud instance
+
+## Access
+
+After deployment, Ghost will be available at:
+- `https://ghost.{your-cloud-domain}` - Public blog
+- `https://ghost.{your-cloud-domain}/ghost` - Admin panel
+
+## First-Time Setup
+
+1. Add and deploy the app:
+   ```bash
+   wild app add ghost
+   wild app deploy ghost
+   ```
+
+2. Navigate to the admin panel and create your first post