Allow config management from UI on production environment

[kalabro]

Problem

Drupal stores most of the configuration in files but still allows to edit it using admin UI. Currently, drupal_reactjs_boilerplate suggests reverting all configs on deployment which means that all changes made by admins on production site will be lost. In some cases it may become an issue:

1. Admin changed site email address and ensured that it works.
2. A few days after that deployment took place. The email was reverted back to the original (old) value.
3. Neither developers nor admins are aware that it happened.