Muli-Stage Docker image for Laravel applications

Dockerfile

#
# PHP Dependencies
#
FROM composer:2.0 as vendor

WORKDIR /app

COPY database/ database/
COPY composer.json composer.json
COPY composer.lock composer.lock

RUN composer install \
    --no-interaction \
    --no-plugins \
    --no-scripts \
    --no-dev \
    --prefer-dist

COPY . .
RUN composer dump-autoload

#
# Frontend
#
FROM node:14.9 as frontend

WORKDIR /app

COPY artisan package.json webpack.mix.js yarn.lock tailwind.js ./

RUN yarn install

COPY resources/js ./resources/js
COPY resources/sass ./resources/sass

RUN yarn production

#
# Application
#
FROM php:7.4-fpm

WORKDIR /app

# Install PHP dependencies
RUN apt-get update -y && apt-get install -y libxml2-dev
RUN docker-php-ext-install pdo pdo_mysql mbstring opcache tokenizer xml ctype json bcmath pcntl

# Copy Frontend build
COPY --from=frontend /app/node_modules/ ./node_modules/
COPY --from=frontend /app/public/js/ ./public/js/
COPY --from=frontend /app/public/css/ ./public/css/
COPY --from=frontend /app/public/mix-manifest.json ./public/mix-manifest.json

# Copy Composer dependencies
COPY --from=vendor /app/vendor/ ./vendor/
COPY . .

RUN php artisan config:cache
RUN php artisan route:cache

You don't need to copy the node_modules in the last step. After yarn production all necessary javascript is compiled into the javascript files in public/js.

I get No package 'oniguruma' found when I want to build this. I added RUN apt-get install -y libonig-dev to fix this issue.

FWIW, You might not need to explicitly install mbstring (or oniguruma) in the Dockerfile, if you're starting with the PHP image. See the official image, it looks like mbstring is already installed.