Dockerfile

# syntax=docker/dockerfile:1

###
# PHP Dev Container
# Utility Tools: PHP, bash, Composer
###
FROM php:8.0-cli AS php_dev_container

# Composer environment variables:
# * default user is superuser (root), so allow them
# * put cache directory in a readable/writable location
# _Note_: When running `composer` in container, use `--no-cache` option
ENV COMPOSER_ALLOW_SUPERUSER=1 \
    COMPOSER_CACHE_DIR=/tmp/.composer/cache

# Update apt sources to use archived Debian repositories
RUN sed -i 's/deb.debian.org/archive.debian.org/g' /etc/apt/sources.list \
    && sed -i '/debian-security/d' /etc/apt/sources.list \
    && sed -i '/stretch-updates/d' /etc/apt/sources.list

# Install dependencies:
# * git: for composer to download packages from source
# * libzip-dev: for composer packages that use ZIP archives
# * unzip: for composer to extract packages
# _Note (Hadolint)_: No version locking for dev container
# hadolint ignore=DL3008
RUN apt-get update && apt-get install -y --no-install-recommends \
        git \
        libzip-dev \
        unzip \
    && rm -rf /var/lib/apt/lists/*

# Copy Composer binary from composer image
# _Note (Hadolint)_: False positive as `COPY` works with images too
# See: https://github.com/hadolint/hadolint/issues/197#issuecomment-1016595425
# hadolint ignore=DL3022
COPY --from=composer:2 /usr/bin/composer /usr/bin/composer

WORKDIR /app