docs: add podman deployment guide

New docs/DEPLOY.md covering container image, compose config, volume
mounts, host networking, operations, and troubleshooting. Updated
README, INSTALL, CHEATSHEET, and DEBUG to reference it.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/CHEATSHEET.md

@@ -9,6 +9,21 @@ bouncer --version                      # version
 bouncer --help                         # help
 ```
 
+## Podman
+
+```bash
+make build      # build container image
+make up         # podman-compose up -d
+make down       # podman-compose down
+make logs       # podman logs -f bouncer
+```
+
+```bash
+podman logs bouncer 2>&1 | grep -E 'INFO|WARN'   # filtered logs
+podman exec -it bouncer bash                      # shell into container
+podman ps --filter name=bouncer                   # status
+```
+
 ## Develop
 
 ```bash