This multistage dockerfile only processes the last "stage"

Dockerfile

# PHP
FROM php:8.0-fpm-alpine AS php

# Install system dependencies
RUN apk update && apk add --no-cache \
    git \
    curl \
    libxml2-dev \
    libzip-dev \
    libpng-dev \
    zip \
    unzip \
    acl \
    fcgi \
    file \
    gettext \
    git \
    $PHPIZE_DEPS \
    icu-dev \
    libzip-dev \
    zlib-dev \
    postgresql-dev \
    oniguruma-dev \
  ;

RUN set -eux; \
  docker-php-ext-configure zip; \
  docker-php-ext-install \
    intl \
    zip \
    opcache \
    pdo_pgsql \
    pgsql \
    mbstring \
    pcntl \
    exif \
    pcntl \
    bcmath \
    gd \
  ; \
  pecl install \
    redis \
  ; \
  pecl clear-cache; \
  docker-php-ext-enable \
    opcache \
    redis \
  ; \
  runDeps="$( \
    scanelf --needed --nobanner --format '%n#p' --recursive /usr/local/lib/php/extensions \
      | tr ',' '\n' \
      | sort -u \
      | awk 'system("[ -e /usr/local/lib/" $1 " ]") == 0 { next } { print "so:" $1 }' \
  )"; \
  apk add --no-cache --virtual .api-phpexts-rundeps $runDeps;

COPY --from=composer:latest /usr/bin/composer /usr/bin/composer

RUN chmod +x /usr/bin/composer; sync

RUN ln -sf $PHP_INI_DIR/php.ini-production $PHP_INI_DIR/php.ini

COPY docker/php/conf.d/production.ini $PHP_INI_DIR/conf.d/config.ini
COPY docker/php/supervisord /var/supervisord

WORKDIR /var/www/html

ENV PATH="${PATH}:/root/.composer/vendor/bin"

# Copy needed resources of app.
COPY app app
COPY bootstrap/app.php bootstrap/app.php
COPY config config
COPY database database
COPY public public
COPY resources resources
COPY routes routes
COPY .env.example .env
COPY artisan artisan
COPY composer.json composer.json
COPY composer.lock composer.lock

RUN mkdir -p \
    bootstrap/cache \
    storage/app/public \
    storage/framework/cache/data \
    storage/framework/sessions \
    storage/framework/views \
    storage/logs \
    ;

#RUN composer install --no-interaction --prefer-dist --optimize-autoloader --no-dev

RUN chmod +x artisan; sync

FROM node:14-alpine AS node

COPY package.json package.json
COPY package-lock.json package-lock.json
COPY webpack.config.js webpack.config.js
COPY webpack.mix.js webpack.mix.js

# Install deps the clean up unused files afterwards
RUN npm i && \
  npm run prod &&\
  rm -rf node_modules \
  resources/js \
  resources/css \
  package.json \
  package-lock.json \
  webpack.config.js \
  webpack.mix.js \
  ;