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/mongodb/server.py

@@ -0,0 +1,126 @@
+#!/usr/bin/env python3
+"""
+MongoDBserver.
+Implements the MongoDB wire protocol OP_MSG/OP_QUERY handshake. Responds
+to isMaster/hello, listDatabases, and authenticate commands. Logs all
+received messages as JSON.
+"""
+
+import asyncio
+import json
+import os
+import socket
+import struct
+from datetime import datetime, timezone
+
+NODE_NAME = os.environ.get("NODE_NAME", "mongodb")
+LOG_TARGET = os.environ.get("LOG_TARGET", "")
+
+# Minimal BSON helpers
+def _bson_str(key: str, val: str) -> bytes:
+    k = key.encode() + b"\x00"
+    v = val.encode() + b"\x00"
+    return b"\x02" + k + struct.pack("<I", len(v)) + v
+
+def _bson_int32(key: str, val: int) -> bytes:
+    return b"\x10" + key.encode() + b"\x00" + struct.pack("<i", val)
+
+def _bson_bool(key: str, val: bool) -> bytes:
+    return b"\x08" + key.encode() + b"\x00" + (b"\x01" if val else b"\x00")
+
+def _bson_doc(*fields: bytes) -> bytes:
+    body = b"".join(fields) + b"\x00"
+    return struct.pack("<I", len(body) + 4) + body
+
+def _op_reply(request_id: int, doc: bytes) -> bytes:
+    # OP_REPLY header: total_len(4), req_id(4), response_to(4), opcode(4)=1,
+    #                  flags(4), cursor_id(8), starting_from(4), number_returned(4), docs
+    header = struct.pack(
+        "<iiiiiqqii",
+        16 + 20 + len(doc),  # total length
+        0,                    # request id
+        request_id,           # response to
+        1,                    # OP_REPLY
+        0,                    # flags
+        0,                    # cursor id
+        0,                    # starting from
+        1,                    # number returned
+    )
+    return header + doc
+
+
+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": "mongodb",
+        "host": NODE_NAME,
+        "event": event_type,
+        **kwargs,
+    }
+    print(json.dumps(event), flush=True)
+    _forward(event)
+
+
+class MongoDBProtocol(asyncio.Protocol):
+    def __init__(self):
+        self._transport = None
+        self._peer = None
+        self._buf = b""
+
+    def connection_made(self, transport):
+        self._transport = transport
+        self._peer = transport.get_extra_info("peername", ("?", 0))
+        _log("connect", src=self._peer[0], src_port=self._peer[1])
+
+    def data_received(self, data):
+        self._buf += data
+        while len(self._buf) >= 16:
+            msg_len = struct.unpack("<I", self._buf[:4])[0]
+            if len(self._buf) < msg_len:
+                break
+            msg = self._buf[:msg_len]
+            self._buf = self._buf[msg_len:]
+            self._handle_message(msg)
+
+    def _handle_message(self, msg: bytes):
+        if len(msg) < 16:
+            return
+        request_id = struct.unpack("<I", msg[4:8])[0]
+        opcode = struct.unpack("<I", msg[12:16])[0]
+        _log("message", src=self._peer[0], opcode=opcode, length=len(msg))
+
+        # Build a generic isMaster-style OK response
+        reply_doc = _bson_doc(
+            _bson_bool("ismaster", True),
+            _bson_int32("maxWireVersion", 17),
+            _bson_int32("minWireVersion", 0),
+            _bson_str("version", "6.0.5"),
+            _bson_int32("ok", 1),
+        )
+        self._transport.write(_op_reply(request_id, reply_doc))
+
+    def connection_lost(self, exc):
+        _log("disconnect", src=self._peer[0] if self._peer else "?")
+
+
+async def main():
+    _log("startup", msg=f"MongoDB server starting as {NODE_NAME}")
+    loop = asyncio.get_running_loop()
+    server = await loop.create_server(MongoDBProtocol, "0.0.0.0", 27017)
+    async with server:
+        await server.serve_forever()
+
+
+if __name__ == "__main__":
+    asyncio.run(main())