ci: Only run deploy on default branch

.gitlab-ci.yml

@@ -39,6 +39,8 @@ package:
   stage: package
   interruptible: true
   image: quay.io/sheogorath/build-ah-engine:latest
+  rules:
+    - if: "$CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH"
   variables:
     LANG: C.UTF-8
   tags:
@@ -56,6 +58,8 @@ test:
   tags:
     - privileged-ram-4gb
   image: quay.io/sheogorath/build-ah-engine:latest
+  rules:
+    - if: "$CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH"
   variables:
     LANG: C.UTF-8
   before_script:
@@ -70,6 +74,8 @@ test:
 
 deploy:
   stage: deploy
+  rules:
+    - if: "$CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH"
   variables:
     PLAYBOOK: static_websites.yml
   trigger: