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PHP-prod

Use this image instead of the normal php-8.3-fpm-alpine.

It's the same except with a custom configuration more suitable for production use.

The image is rebuilt automatically whenever a new version of the original php image is pushed.

Usage

Simple PHP app with no specific extensions required

Replace php:8.3-fpm-alpine in your docker-compose.yml file with ghcr.io/deltablot/php-prod:8.3.

PHP app requiring an extension

Use ghcr.io/deltablot/php-prod as base image and docker-php-ext-install to install the required extensions.

Example with mysqli is present in this repository: Dockerfile.mysqli.

Running your code

You should have a running nginx serving your files already.

In the nginx config file:

location ~ \.php$ {
    fastcgi_pass php:9000;
    fastcgi_index index.php;
    include fastcgi_params;
    fastcgi_param SCRIPT_FILENAME /var/www/html/your-code$fastcgi_script_name;
}

Adjust the path to where your code exists (and it will depend on how you mount the volumes of course).

Example docker-compose.yml with nginx in a container

The websites are mounted in /sites in the (read-only) nginx container, and the local nginx/sites folder contain folders of the websites source files. The local nginx/conf folder contains the nginx config files.

# NGINX
nginx:
  image: nginx:1.26-alpine
  container_name: nginx
  restart: always
  read_only: true
  depends_on:
    - php
  expose:
    - '80'
  volumes:
    - ./nginx/conf:/etc/nginx:ro
    - ./nginx/sites:/sites:ro
  networks:
    - your-net

# PHP
php:
  image: ghcr.io/deltablot/php-prod:8.3
  build:
    context: ./php-prod
    dockerfile: Dockerfile.mysqli
  expose:
    - '9000'
  # if hosting several sites, add them as volume here
  volumes:
    - ./nginx/sites/your-site:/var/www/html/your-site
  networks:
    - your-net

What is changed

Secure sessions

Sessions are moved to a dedicated directory with strict permissions.

Use strict mode and longer id length.

Secure cookies

Force httponly and secure flag for cookies.

Miscellaneous

  • Don't expose PHP version
  • Make sure only PHP files are processed
  • Disallow url_fopen

Source

Based on https://dev.to/elabftw/10-steps-for-securing-a-php-app-5fnp.

Build from source

git clone https://github.com/deltablot/php-prod
cd php-prod
docker build -t deltablot/php-prod .

License

MIT. See LICENSE file.