Trying to use Docker on the 1.35 branch fails at composer update due to:
+ docker-compose exec mediawiki composer update
ComposerHookHandler::onPreUpdate
Loading composer repositories with package information
Warning from https://repo.packagist.org: You are using an outdated version of Composer. Composer 2 is now available and you should upgrade. See https://getcomposer.org/2
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.
Problem 1 - This package requires php >=7.3.19 but your PHP version (7.2.31) does not satisfy that requirement. Problem 2 - Installation request for doctrine/dbal 3.0.0 -> satisfiable by doctrine/dbal[3.0.0]. - doctrine/dbal 3.0.0 requires php ^7.3 || ^8.0 -> your PHP version (7.2.31) does not satisfy that requirement.
and the image docker-registry.wikimedia.org/dev/stretch-php72-fpm-apache2-xdebug:0.4.0 is (apparently) only providing PHP 7.2.
master is working OK, I guess because it was doctrine/dbal": "2.10.4||3.0.0.