switch to master branch

.gitlab-ci.yml

@@ -17,8 +17,8 @@ before_script:
 build_app:
   stage: build
   script:
-    - docker pull $CI_REGISTRY_IMAGE:test || true
-    - docker build --cache-from $CI_REGISTRY_IMAGE:test -t $IMAGE_TAG_APP .
+    - docker pull $CI_REGISTRY_IMAGE:master || true
+    - docker build --cache-from $CI_REGISTRY_IMAGE:master -t $IMAGE_TAG_APP .
     - docker push $IMAGE_TAG_APP
 
 build_nginx: