Quick Dockerfile for php and composer

Dockerfile

# Generated using Google Bard with prompt:
# generate a dockerfile that does the following:
# uses composer image to execute composer install on a given directory
# uses a nodejs image to execute npm install && npm run build on a given directory
# copies the composer and nodejs output to a PHP image that runs WordPress

# composer task
FROM composer:latest AS composer
WORKDIR /app
COPY composer.json composer.lock ./
RUN composer install

# nodejs task
FROM node:16-alpine AS nodejs
WORKDIR /app
COPY package.json package-lock.json ./
RUN npm install && npm run build

FROM php:8.1-fpm
WORKDIR /var/www/html

# TODO: copy wordpress steps here...

# copy output to new php image
COPY --from=composer /app/vendor/ ./vendor/
COPY --from=nodejs /app/public/ ./public/

EXPOSE 80

CMD ["php-fpm"]