Update config_prod.yml settings

Always use the dev env if the SYMFONY_ENV var isn't set

Improve Docker support on Windows

Use --classmap-authoritative for Composer install in prod mode

Upgrade PHP and APCu

Use recommended settings for performance in php.ini

Fix a typo on doc URL and stable version

Remove pre-existing PID file before starting apache

* Update dependencies
* Install the schema generator

fix link in readme

Simplify composer.sh

Run composer install on Docker container startup

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