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/tftp/Dockerfile

@@ -5,7 +5,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     python3 \
     && rm -rf /var/lib/apt/lists/*
 
-COPY tftp_honeypot.py /opt/tftp_honeypot.py
+COPY server.py /opt/server.py
 COPY entrypoint.sh /entrypoint.sh
 RUN chmod +x /entrypoint.sh
 

templates/tftp/entrypoint.sh

@@ -1,3 +1,3 @@
 #!/bin/bash
 set -e
-exec python3 /opt/tftp_honeypot.py
+exec python3 /opt/server.py

templates/tftp/server.py

@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 """
-TFTP honeypot (UDP 69).
+TFTP server (UDP 69).
 Parses RRQ (read) and WRQ (write) requests, logs filename and transfer mode,
 then responds with an error packet. Logs all requests as JSON.
 """
@@ -12,7 +12,7 @@ import socket
 import struct
 from datetime import datetime, timezone
 
-HONEYPOT_NAME = os.environ.get("HONEYPOT_NAME", "tftpserver")
+NODE_NAME = os.environ.get("NODE_NAME", "tftpserver")
 LOG_TARGET = os.environ.get("LOG_TARGET", "")
 
 # TFTP opcodes
@@ -40,7 +40,7 @@ def _log(event_type: str, **kwargs) -> None:
     event = {
         "ts": datetime.now(timezone.utc).isoformat(),
         "service": "tftp",
-        "host": HONEYPOT_NAME,
+        "host": NODE_NAME,
         "event": event_type,
         **kwargs,
     }
@@ -81,7 +81,7 @@ class TFTPProtocol(asyncio.DatagramProtocol):
 
 
 async def main():
-    _log("startup", msg=f"TFTP honeypot starting as {HONEYPOT_NAME}")
+    _log("startup", msg=f"TFTP server starting as {NODE_NAME}")
     loop = asyncio.get_running_loop()
     transport, _ = await loop.create_datagram_endpoint(
         TFTPProtocol, local_addr=("0.0.0.0", 69)