add comprehensive documentation for all Ansible roles

- Add main README with infrastructure overview and usage instructions
- Document bootstrap role for server initialization and security hardening
- Document common role for shared server configuration
- Document cron role for scheduled tasks and automation
- Document docker role with detailed service descriptions and deployment patterns
- Include MMDL service documentation with setup requirements
- Add troubleshooting guides and security considerations

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

roles/cron/README.md

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+# Cron Role
+
+## Purpose
+Manages scheduled tasks and automated maintenance jobs for the infrastructure.
+
+## What It Does
+
+### Warhammer RSS Feed Updater
+- Copies `update_warhammer_feed.sh` script to `/usr/local/bin/` with executable permissions
+- Creates a daily cron job that runs at 09:10 AM
+- The script performs these actions:
+  1. Creates a temporary directory `/tmp/warhammer_feed`
+  2. Runs a custom Docker container (`git.thesatelliteoflove.com/phil/rss-warhammer`) to generate RSS feed
+  3. Copies the generated `warhammer_rss_feed.xml` to `/opt/stacks/caddy/site/tsol/feeds/`
+  4. Restarts the Glance dashboard stack to reflect the updated feed
+
+## Files Managed
+- `/usr/local/bin/update_warhammer_feed.sh` - RSS feed update script
+- Cron job: "Update Warhammer RSS Feed" (daily at 09:10)
+
+## Dependencies
+- Requires Docker to be installed and running
+- Depends on the following Docker stacks being deployed:
+  - Custom RSS generator container at `git.thesatelliteoflove.com/phil/rss-warhammer`
+  - Caddy web server stack at `/opt/stacks/caddy/`
+  - Glance dashboard stack at `/opt/stacks/glance/`
+
+## Usage
+This role is automatically applied as part of the main site.yml playbook with the `cron` tag.
+
+```bash
+# Deploy only cron jobs
+ansible-playbook site.yml -i hosts.yml --tags cron
+```
+
+## Customization
+To add additional cron jobs, create new tasks in the main.yml file following the same pattern as the Warhammer feed updater.