chore: Make merge trains possible

.gitlab-ci.yml

@@ -3,6 +3,12 @@ stages:
   - builddocs
   - deploy
 
+workflow:
+  rules:
+    - if: $CI_MERGE_REQUEST_IID
+    - if: $CI_COMMIT_TAG
+    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
+
 coverage:
   tags:
     - linux
@@ -94,8 +100,8 @@ build_api_doc:
   artifacts:
     paths:
       - doc/api/
-  only:
+  rules:
-    - main
+    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
 
 build_doc:
   tags:
@@ -109,8 +115,8 @@ build_doc:
   artifacts:
     paths:
       - doc-public
-  only:
+  rules:
-    - main
+    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
 
 pages:
   tags:
@@ -127,8 +133,8 @@ pages:
   artifacts:
     paths:
       - public
-  only:
+  rules:
-    - main
+    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
 
 # Adds license-scanning job. Because Gitlab does not support pub.dev
 # we added https://github.com/oss-review-toolkit/ort