fix ci

.gitlab-ci.yml

 variables:
   GIT_SUBMODULE_STRATEGY: normal
   DOCKER_TAG: ${CI_COMMIT_REF_NAME}
-  DOCKER_IMAGE_DEV: villas/web-dev:${DOCKER_TAG}
+  DOCKER_IMAGE_DEV: villas/web-dev:${CI_COMMIT_REF_NAME}
 
 cache:
   untracked: true

packaging/docker/Dockerfile-dev → packaging/docker/Dockerfile.dev

 FROM node:12.2
 
-RUN apt-git install -y \
+RUN apt-get install -y \
         git