Exposed dualstack argument on Docker

Signed-off-by: simonmicro <simon@simonmicro.de>

Author: simonmicro

docker/docker-py3-kms-minimal/Dockerfile

@@ -2,6 +2,7 @@
 FROM alpine:3.15
 
 ENV IP ::
+ENV DUALSTACK 1
 ENV PORT 1688
 ENV EPID ""
 ENV LCID 1033

docker/docker-py3-kms/Dockerfile

@@ -5,6 +5,7 @@ ARG BUILD_COMMIT=unknown
 ARG BUILD_BRANCH=unknown
 
 ENV IP ::
+ENV DUALSTACK 1
 ENV PORT 1688
 ENV EPID ""
 ENV LCID 1033

docker/start.py

@@ -45,6 +45,9 @@ def start_kms(logger):
     for i in range(1, len(listen_ip)):
       command.append("-n")
       command.append(listen_ip[i] + "," + listen_port)
+    if dual := os.environ.get('DUALSTACK'):
+      command.append("-d")
+      command.append(dual)
 
   logger.debug("server_cmd: %s" % (" ".join(str(x) for x in command).strip()))
   pykms_process = subprocess.Popen(command)