php-fpm docker 中的作曲家来自 composer:1.8.4

Question

我有一个构建 php-fpm 映像的 .docker 文件，我尝试从 docker 映像安装 Composer，如下所示：

FROM php:7.3.3-fpm-alpine as base

WORKDIR /var/www

# Override Docker configuration: listen on Unix socket instead of TCP
RUN sed -i "s|listen = 9000|listen = /var/run/php/fpm.sock\nlisten.mode = 0666|" /usr/local/etc/php-fpm.d/zz-docker.conf

# Install dependencies
RUN set -xe \
    && apk add --no-cache bash icu-dev \
    && docker-php-ext-install pdo pdo_mysql intl pcntl

CMD ["php-fpm"]

FROM composer:1.8.4 as composer

RUN rm -rf /var/www && mkdir /var/www
WORKDIR /var/www

COPY composer.* /var/www/

ARG APP_ENV=dev

RUN set -xe \
    && if [ "$APP_ENV" = "prod" ]; then export ARGS="--no-dev"; fi \
    && composer install --prefer-dist --no-scripts --no-progress --no-suggesthere

问题是 COPY composer.* /var/www/ 似乎无法正常工作，因为它会抛出错误：

composer install --prefer-dist --no-scripts --no-progress --no-suggest --no-interaction --no-dev Composer 在 /var/www

似乎作曲家图像缺少某些东西或者我跳过了一些步骤，请你帮忙，我都是 docker 和 php 的新手。

Answer 1

中的问题

WORKDIR /var/www

The WORKDIR command is used to define the working directory of a Docker container at any given time. The command is specified in the Dockerfile.

Any RUN, CMD, ADD, COPY, or ENTRYPOINT command will be executed in the specified working directory.

来源：https://www.educative.io/edpresso/what-is-the-workdir-command-in-docker

php-fpm docker 中的作曲家来自 composer:1.8.4

Composer in php-fpm docker from composer:1.8.4

php

composer-php

docker

docker-compose