Add per-service customization, stealth hardening, and BYOS support

- HTTP: configurable server_header, response_code, fake_app presets
  (apache/nginx/wordpress/phpmyadmin/iis), extra_headers, custom_body,
  static files directory mount
- SSH/Cowrie: configurable kernel_version, hardware_platform, ssh_banner,
  and users/passwords via COWRIE_USERDB_ENTRIES; switched to build mode
  so cowrie.cfg.j2 persona fields and userdb.txt generation work
- SMTP: configurable banner and MTA hostname
- MySQL: configurable version string in protocol greeting
- Redis: configurable redis_version and os string in INFO response
- BYOS: [custom-*] INI sections define bring-your-own Docker services
- Stealth: rename all *_honeypot.py → server.py; replace HONEYPOT_NAME
  env var with NODE_NAME across all 22+ service templates and plugins;
  strip "honeypot" from all in-container file content
- Config: DeckyConfig.service_config dict; INI [decky-N.svc] subsections;
  composer passes service_cfg to compose_fragment
- 350 tests passing (100%)

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

templates/rdp/server.py

@@ -0,0 +1,72 @@
+#!/usr/bin/env python3
+"""
+Minimal RDP server using Twisted.
+Listens on port 3389, logs connection attempts and any credentials sent
+in the initial RDP negotiation request. Forwards events as JSON to
+LOG_TARGET if set.
+"""
+
+import json
+import os
+import socket
+import sys
+from datetime import datetime, timezone
+
+from twisted.internet import protocol, reactor
+from twisted.python import log as twisted_log
+
+NODE_NAME = os.environ.get("NODE_NAME", "WORKSTATION")
+LOG_TARGET = os.environ.get("LOG_TARGET", "")
+
+
+def _forward(event: dict) -> None:
+    if not LOG_TARGET:
+        return
+    try:
+        host, port = LOG_TARGET.rsplit(":", 1)
+        with socket.create_connection((host, int(port)), timeout=3) as s:
+            s.sendall((json.dumps(event) + "\n").encode())
+    except Exception:
+        pass
+
+
+def _log(event_type: str, **kwargs) -> None:
+    event = {
+        "ts": datetime.now(timezone.utc).isoformat(),
+        "service": "rdp",
+        "host": NODE_NAME,
+        "event": event_type,
+        **kwargs,
+    }
+    print(json.dumps(event), flush=True)
+    _forward(event)
+
+
+class RDPServerProtocol(protocol.Protocol):
+    def connectionMade(self):
+        peer = self.transport.getPeer()
+        _log("connection", src_ip=peer.host, src_port=peer.port)
+        # Send a minimal RDP Connection Confirm PDU to keep clients talking
+        # X.224 Connection Confirm: length=0x0e, type=0xd0 (CC), dst=0, src=0, class=0
+        self.transport.write(b"\x03\x00\x00\x0b\x06\xd0\x00\x00\x00\x00\x00")
+
+    def dataReceived(self, data: bytes):
+        peer = self.transport.getPeer()
+        _log("data", src_ip=peer.host, src_port=peer.port, bytes=len(data), hex=data[:64].hex())
+        # Drop the connection after receiving data — we're just a logger
+        self.transport.loseConnection()
+
+    def connectionLost(self, reason):
+        peer = self.transport.getPeer()
+        _log("disconnect", src_ip=peer.host, src_port=peer.port)
+
+
+class RDPServerFactory(protocol.ServerFactory):
+    protocol = RDPServerProtocol
+
+
+if __name__ == "__main__":
+    twisted_log.startLogging(sys.stdout)
+    _log("startup", msg=f"RDP server starting as {NODE_NAME} on port 3389")
+    reactor.listenTCP(3389, RDPServerFactory())
+    reactor.run()