失败提示：
Step 8/11 : RUN composer global require "fxp/composer-asset-plugin:^1.4.4"
---> Running in dbdXXX8d88f
Changed current directory to /root/.config/composer
[RuntimeException]
No composer.json present in the current directory, this may be the cause of the following exception.
[InvalidArgumentException]
Package fxp/composer-asset-plugin at version ^1.4.4 has a PHP requirement incompatible with your PHP version, PHP extensions and Composer version
require [--dev] [--dry-run] [--prefer-source] [--prefer-dist] [--fixed] [--no-suggest] [--no-progress] [--no-update] [--no-install] [--no-scripts] [--update-no-dev] [-w|--update-with-dependencies] [-W|--update-with-all-dependencies] [--with-dependencies] [--with-all-dependencies] [--ignore-platform-req IGNORE-PLATFORM-REQ] [--ignore-platform-reqs] [--prefer-stable] [--prefer-lowest] [--sort-packages] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--apcu-autoloader] [--apcu-autoloader-prefix APCU-AUTOLOADER-PREFIX] [--] []...
ERROR: Service 'php' failed to build : The command '/bin/sh -c composer global require "fxp/composer-asset-plugin:^1.4.4"' returned a non-zero code: 1
PS D:\docker\yii2_fecshop_docker>