Add Docker deployment and Apache reverse proxy setup

🐳 Docker Implementation:
- Add Dockerfile with Alpine Linux (46MB image)
- Add docker-compose.yml with production-ready config
- Add manage-relay.sh for easy local management
- Add stella-relay.service for systemd auto-start
- Published images: silberengel/orly-relay:latest, :v1, :v2

🔧 Apache Reverse Proxy:
- Add comprehensive Apache proxy guide for Plesk and standard Apache
- Add working WebSocket proxy configuration (ws:// not http://)
- Add troubleshooting guide based on real deployment experience
- Add debug-websocket.sh script for systematic diagnosis

stella-relay.service

@@ -0,0 +1,39 @@
+[Unit]
+Description=Stella's Orly Nostr Relay
+Documentation=https://github.com/Silberengel/next.orly.dev
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+User=madmin
+Group=madmin
+WorkingDirectory=/home/madmin/Projects/GitCitadel/next.orly.dev
+ExecStart=docker compose up stella-relay
+ExecStop=docker compose down
+Restart=always
+RestartSec=10
+TimeoutStartSec=60
+TimeoutStopSec=30
+
+# Environment variables
+Environment=ORLY_DATA_DIR=/home/madmin/.local/share/orly-relay
+Environment=ORLY_LISTEN=127.0.0.1
+Environment=ORLY_PORT=7777
+Environment=ORLY_LOG_LEVEL=info
+Environment=ORLY_OWNERS=npub1v30tsz9vw6ylpz63g0a702nj3xa26t3m7p5us8f2y2sd8v6cnsvq465zjx
+Environment=ORLY_ADMINS=npub1v30tsz9vw6ylpz63g0a702nj3xa26t3m7p5us8f2y2sd8v6cnsvq465zjx,npub1l5sga6xg72phsz5422ykujprejwud075ggrr3z2hwyrfgr7eylqstegx9z
+
+# Security settings
+NoNewPrivileges=true
+ProtectSystem=strict
+ProtectHome=read-only
+ReadWritePaths=/home/madmin/.local/share/orly-relay
+ReadWritePaths=/home/madmin/Projects/GitCitadel/next.orly.dev/data
+
+# Resource limits
+LimitNOFILE=65536
+LimitNPROC=4096
+
+[Install]
+WantedBy=multi-user.target