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

discourse/README.md

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+# Discourse
+
+Discourse is a modern, open-source discussion platform designed for online communities and forums.
+
+## Dependencies
+
+- **PostgreSQL** - Database for storing application data
+- **Redis** - Used for caching and background jobs
+
+## Configuration
+
+Key settings configured through your instance's `config.yaml`:
+
+- **domain** - Where Discourse will be accessible (default: `discourse.{your-cloud-domain}`)
+- **adminEmail** - Admin account email (defaults to your operator email)
+- **adminUsername** - Admin account username (default: `admin`)
+- **siteName** - Your community name (default: `Community`)
+- **SMTP** - Email delivery settings inherited from your Wild Cloud instance
+
+## Access
+
+After deployment, Discourse will be available at:
+- `https://discourse.{your-cloud-domain}`
+
+## First-Time Setup
+
+1. Add and deploy the app:
+   ```bash
+   wild app add discourse
+   wild app deploy discourse
+   ```
+
+2. Log in with the admin credentials configured during setup
+
+3. Complete the setup wizard to configure your community