Add new file

.gitlab-ci.yml

+build_image:
+  script:
+    - docker login -u gitlab-ci-token -p $CI_BUILD_TOKEN $CI_REGISTRY
+    - docker build -t $CI_REGISTRY_IMAGE .
+    - docker push $CI_REGISTRY_IMAGE
+  only:
+    - master
+ 
+  tags:
+    - general
+  
+  
+