Merge branch '13-main_or_master' into 'master'

fix: use master or main for production env

Closes #13

See merge request to-be-continuous/docker!10

templates/gitlab-ci-docker.yml

@@ -41,7 +41,7 @@ variables:
   PUBLISH_ON_PROD: "true"
 
   # default production ref name (pattern)
-  PROD_REF: '/^master$/'
+  PROD_REF: '/^(master|main)$/'
   # default integration ref name (pattern)
   INTEG_REF: '/^develop$/'