feat: add demo deployment with Caddy

deploy/Caddyfile

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+demo.getnora.io {
+    reverse_proxy nora:4000
+
+    encode gzip
+
+    header {
+        -Server
+        X-Content-Type-Options nosniff
+        X-Frame-Options DENY
+    }
+
+    log {
+        output stdout
+        format console
+    }
+}

deploy/README.md

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+# NORA Demo Deployment
+
+## DNS Setup
+
+Add A record:
+```
+demo.getnora.io → <VPS_IP>
+```
+
+## Deploy
+
+```bash
+# Clone repo
+git clone https://github.com/getnora-io/nora.git
+cd nora/deploy
+
+# Start
+docker compose up -d
+
+# Check logs
+docker compose logs -f
+```
+
+## URLs
+
+- **Web UI:** https://demo.getnora.io/ui/
+- **API Docs:** https://demo.getnora.io/api-docs
+- **Health:** https://demo.getnora.io/health
+
+## Docker Usage
+
+```bash
+# Tag and push
+docker tag myimage:latest demo.getnora.io/myimage:latest
+docker push demo.getnora.io/myimage:latest
+
+# Pull
+docker pull demo.getnora.io/myimage:latest
+```
+
+## Management
+
+```bash
+# Stop
+docker compose down
+
+# Restart
+docker compose restart
+
+# View logs
+docker compose logs -f nora
+docker compose logs -f caddy
+
+# Update
+docker compose pull
+docker compose up -d
+```

deploy/docker-compose.yml

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+services:
+  nora:
+    image: ghcr.io/getnora-io/nora:latest
+    build:
+      context: ..
+      dockerfile: Dockerfile
+    restart: unless-stopped
+    volumes:
+      - nora-data:/data
+    environment:
+      - RUST_LOG=info
+      - NORA_HOST=0.0.0.0
+      - NORA_PORT=4000
+      - NORA_AUTH_ENABLED=false
+    networks:
+      - nora-net
+
+  caddy:
+    image: caddy:2-alpine
+    restart: unless-stopped
+    ports:
+      - "80:80"
+      - "443:443"
+    volumes:
+      - ./Caddyfile:/etc/caddy/Caddyfile:ro
+      - caddy-data:/data
+      - caddy-config:/config
+    networks:
+      - nora-net
+    depends_on:
+      - nora
+
+volumes:
+  nora-data:
+  caddy-data:
+  caddy-config:
+
+networks:
+  nora-net: