图像gitlab-ci-pipeline-php找不到作曲者cli

Question

我有这个gilab-ci.yml：

build:
    image: edbizarro/gitlab-ci-pipeline-php:7.3-alpine
    script:
        - composer install --prefer-dist --no-ansi --no-interaction --no-progress
        - sudo apk add --no-cache zip unzip

我正遇到此错误：

Skipping Git submodules setup
$ composer install --prefer-dist --no-ansi --no-interaction --no-progress
bash: line 90: composer: command not found
ERROR: Job failed: exit status 1_