Add Synchronet BBS with Legend of the Red Dragon

- Configure bbsio/synchronet:3.19c Docker image
- Expose web interface (ports 8023/8443) and fTelnet websocket terminals
- Include telnet (23), SSH (2222), and classic BBS protocols
- LORD (Legend of the Red Dragon) included as built-in door game
- Add comprehensive README with setup and configuration instructions

synchronet/docker-compose.yaml

@@ -0,0 +1,29 @@
+services:
+  synchronet:
+    image: bbsio/synchronet:3.19c
+    container_name: synchronet
+    restart: unless-stopped
+    networks:
+      - npm-network
+    ports:
+      # Web interfaces
+      - "8023:80"           # HTTP web interface
+      - "8443:443"          # HTTPS web interface
+      # Terminal access
+      - "23:23"             # Telnet
+      - "2222:22"           # SSH (using 2222 to avoid conflict with host SSH)
+      # Web-based terminal (fTelnet)
+      - "1123:1123"         # WebSocket terminal (ws)
+      - "11235:11235"       # WebSocket terminal (wss)
+      # Optional: Classic BBS protocols
+      - "21:21"             # FTP
+      - "6667:6667"         # IRC
+    volumes:
+      - /srv/synchronet:/sbbs-data
+    environment:
+      - TZ=America/New_York
+      - SBBSCTRL=/sbbs-data/ctrl
+
+networks:
+  npm-network:
+    external: true