changing project struture according to moodle suggestions

README.md

server/.docker/nginx/default.conf

server/.gitignore

server/README.md

server/compose.yaml

server/symfony.dockerfile

server/web_app/.env.dev

server/web_app/.gitignore

server/web_app/bin/console

server/web_app/composer.json

server/web_app/config/bundles.php

server/web_app/config/packages/cache.yaml

server/web_app/config/packages/doctrine.yaml

server/web_app/config/packages/doctrine_migrations.yaml

server/web_app/config/packages/framework.yaml

server/web_app/config/packages/routing.yaml

server/web_app/config/packages/security.yaml

server/web_app/config/preload.php

server/web_app/config/routes.yaml

server/web_app/config/routes/framework.yaml