Code formatting according to code style. Code refactoring
Delete the default symfony upgrade and license files
Update build scipt update_project.sh

Remove unnecessary interactive questions. Now the behavior of the script depends on the environment
variable VDOLGAH_PROD, which is responsible for the project environment (production if set and equal 1; development otherwise).
Also remove force cache folder deleting.
Add composer.lock file

It's necessary because this file locks the project to those specific versions of dependencies.
This means that anyone who sets up the project will download the exact same version of the dependencies.
Everyone runs on the same dependencies, which mitigates the potential for bugs affecting only some parts of the deployments.