feat(ci): weekly backup

Merge branch 'weekly-schedule' into 'master'

See merge request core-services/r3lab/r3-pages!12

.gitlab-ci.yml

@@ -45,7 +45,8 @@ Deploy to production:
 Create the backup:
   stage: backup
   image: alpine:3.1
-  when: manual
+  only:
+    - schedules
   before_script:
     - 'which ssh-agent || ( apk add --update openssh )'
     - eval $(ssh-agent -s)