Update default docker version of mt-watcher to 29.1.3.

Author: usualoma

CHANGELOG.md

@@ -11,6 +11,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * If the given URL is http://github.com/... and returns 404, then try to download the archive with the `gh` command and try to download the archive at http://github.com/...
 * Allow starman's --user option to be specified in the MT_UID environment variable.
 
+### Changed
+
+* Update default docker version of mt-watcher to 29.1.3.
+
+The DOCKER_VERSION environment variable can be used to override the default version.
+```
+$ make up-psgi DOCKER_VERSION=28.5.2 # If you want to use an older specific version
+```
+
 ## [2.8.0] - 2025-04-23
 
 ### Changed

Makefile

@@ -33,6 +33,7 @@ ifneq (${MT_EXPOSE_PORT},)
 export DOCKER_COMPOSE_YAML_EXPOSE=-f ./mt/mt-expose.yml
 endif
 
+export DOCKER_VERSION
 export DOCKER_COMPOSE_USER_YAML
 export DOCKER_MT_BUILD_CONTEXT
 export DOCKER_MT_DOCKERFILE

mt/common.yml

@@ -57,6 +57,8 @@ services:
   mt-watcher:
     build:
       context: mt-watcher
+      args:
+        - DOCKER_VERSION=${DOCKER_VERSION:-29.1.3}
     working_dir: /var/www/cgi-bin/mt
     environment:
       PERL_FNS_NO_OPT: ${PERL_FNS_NO_OPT:-0}

mt/mt-watcher/Dockerfile

@@ -1,6 +1,6 @@
-FROM perl:5.36-slim
+FROM perl:5.42-slim
 
-ARG DOCKER_VERSION=20.10.9
+ARG DOCKER_VERSION
 
 RUN set -ex \
     \