Add gitlab ci github mirror job

Author: martijnrondeel

.gitlab-ci.yml

@@ -0,0 +1,13 @@
+stages:
+  - mirror
+
+mirror:github:
+  image: debian
+  stage: mirror
+  script:
+    - apt-get update && apt-get install -y git
+    - git clone --mirror https://git.bitsensor.io/front-end/elastalert-kibana-plugin.git mirror-github
+    - cd mirror-github
+    - git remote add github https://$MIRROR_GITHUB_USER:$MIRROR_GITHUB_PASSWORD@$MIRROR_GITHUB_URL
+    - git push -u github -q --mirror
+  when: always