add dockerhub

.gitlab-ci.yml

@@ -21,3 +21,15 @@ build:
     - "docker push \"$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG\""
   except:
     - "master"
+
+deploy-github:
+  stage: "deploy"
+  before_script:
+    - "docker login -u \"$GITHUB_USER\" -p \"$GITHUB_PASSWORD\""
+    - "docker login -u \"$CI_REGISTRY_USER\" -p \"$CI_REGISTRY_PASSWORD\" $CI_REGISTRY"
+  script:
+    - "docker pull \"$CI_REGISTRY_IMAGE\""
+    - "docker tag \"$CI_REGISTRY_IMAGE\" \"$GITHUB_USER/$GITHUB_PROJECT\""
+    - "docker push \"$GITHUB_USER/$GITHUB_PROJECT\""
+  only:
+    - "master"