docker: add apache ports, init functions

[edgd1er]

Description

first pr to enhance docker image creation: add function, speed up building.

composer: check exists before remove
APACHE_HTTP(S)_PORT: can change local port.
image: minimise layers
init fonctions:
    setTimeZone
    apache_setup:setting ports, no certs generation, no a2enmod/enssite.
    set_root_password
    db_creds

Suggested changelog entry

Related issues/external references

Fixes #

Types of changes

• [ ] Bug fix (non-breaking change which fixes)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
  • [ ] This change is only breaking for integrators, not for external standards or end-users.
• [ ] Documentation improvement

None relevant, no new feature, no breaking change.

PR checklist

• [x ] I have checked there is no other PR open for the same change.
• [x ] I have read the [La ligne directrice pour contribuer à ce projet / Contribution guidelines for this project).
• [x ] I grant the project the right to include and distribute the code under the GNU.
• [ ] I have added tests to cover my changes.
• [x ] I have verified that the code complies with the projects coding standards.
• [ ] [Required for new sniffs] I have added MD documentation for the sniff.