Merge branch '19-vault-jwt-authentication-not-working' into 'master'

Resolve "Vault JWT authentication not working"

Closes #19

See merge request to-be-continuous/docker!22

templates/gitlab-ci-docker-vault.yml

 # =====================================================================================================================
 # === Vault template variant
 # =====================================================================================================================
-variables:
-  # variables have to be explicitly declared in the YAML to be exported to the service
-  VAULT_ROLE_ID: "$VAULT_ROLE_ID"
-  VAULT_SECRET_ID: "$VAULT_SECRET_ID"
 
 .docker-base:
   services: