Custom php.ini from root directory

[aepod]

Description

This change adds a command to the entrypoint.sh which will copy in the php.ini from the root directory. This happens before the php-fpm service or cli command is run.

This creates zzz-custom-php.ini which is named so it comes last, after all the default docker and magento extension configurations.

Windows/Mac users who are using file synchronization will need to ensure that the file sync is complete or the php.ini will not be copied into the configuration directory.

Fixed Issues (if relevant)

1. Add possibility to read php.ini  #126: Add possibility to read php.ini

Manual testing scenarios

1. See Added Specify Docker Build Sources section to Extending Docker Page devdocs#6408 for details on how to import from custom docker image
2. Once you are building from vendor/magento/magento-cloud-docker/images/php/phpversion/ you should be able to test this.

Please let me know if you have any questions.

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages

[aepod]

@bbatsche I sorted out the order on those, missed that when I brought the changes into the template.

[andriyShevtsov]

QA approved