node_modules not mounted in docker container - node.js

Question

I have dockerized a php application which require some npm dependencies, so I've installed in the Docker container nodejs and the required packages using:
FROM php:8.0.2-fpm-alpine
WORKDIR /var/www/html
RUN docker-php-ext-install pdo_mysql
RUN docker-php-ext-install mysqli
RUN apk add icu-dev
RUN docker-php-ext-configure intl && docker-php-ext-install intl
RUN apk add --update libzip-dev curl-dev &&\
docker-php-ext-install curl && \
apk del gcc g++ &&\
rm -rf /var/cache/apk/*
COPY docker/php-fpm/config/php.ini /usr/local/etc/php/
COPY --from=composer:latest /usr/bin/composer /usr/local/bin/composer
RUN apk add --update nodejs nodejs-npm
RUN npm install gulp-cli -g
RUN npm install
COPY src src/
CMD ["php-fpm"]
EXPOSE 9000
this is my docker-compose.yml:
version: '3.7'
services:
php-fpm:
container_name: boilerplate_app
restart: always
build:
context: .
dockerfile: ./docker/php-fpm/Dockerfile
volumes:
- ./src:/var/www/html
the problem's that when I enter in the container using: docker exec -ti boilerplate_app sh
and launch that command: ls -la I can't see any node_modules folder, infact, if I try to execute the installed dependency gulp I get:
Local modules not found in /var/www/html
Try running: npm install
What I did wrong?

Answer 1

There are two issues:
You are running npm install in a folder that does not contain any package.json listing the required node modules to install. If you inspect the logs you should see something like
no such file or directory, open '/var/www/html/package.json'
Moreover, when you mount your local src folder, you are replacing the content of /var/www/html/ with src content, which might not include any node_modules folder
volumes:
- ./src:/var/www/html