Fixes : debug mode disabled and composer dev dependencies not installed in dev container

[AnouarTouati]

This addresses the issues i described here #15751. this fix changes the Dockerfile.alpine which also used by docker-alpine.yml workflow

also enables debug in the Laravel app.

[what-the-diff]

PR Summary

• Enabled Debugging in the Development Environment
  The setting for application debugging (APP_DEBUG) in the development environment's file, .env.dev.docker, has been shifted from false (off) to true (on). This change is designed to assist with identifying and resolving issues during development due to its ability to provide more detailed information when something doesn't work as expected.

• Development Dependencies Installation In The Docker File
  The composer install command in Dockerfile.alpine has been updated to allow the installation of development dependencies. This has been achieved by removing the --no-dev flag. This change will provide developers with tools and libraries that are necessary during development but not needed in production.