add .gitlab-ci.yml & Dockerfile

.gitlab-ci.yml

+variables:
+  DOCKER_REGISTRY: 't-docker.51gjj.com'
+
+before_script:
+  - docker login -u pengtianzi -p 4dc8b3a4d91fa7fa $DOCKER_REGISTRY
+
+stages:
+  - pre_deploy
+
+build_docker_image:
+  stage: pre_deploy
+  script:
+    - export IMAGE_TAG=${CI_COMMIT_TAG:-latest}
+    - docker build -t $DOCKER_REGISTRY/$CI_PROJECT_NAMESPACE/$CI_PROJECT_NAME:$IMAGE_TAG .
+    - docker push $DOCKER_REGISTRY/$CI_PROJECT_NAMESPACE/$CI_PROJECT_NAME:$IMAGE_TAG
+  tags:
+    - docker-image-builder

Dockerfile

+FROM t-docker.51gjj.com/tools/node:8.12.0
+
+ENV LANG C.UTF-8
+ENV NODE_ENV production
+ENV PATH $PATH:/usr/local/node/bin/
+RUN mkdir -p /usr/src/app
+WORKDIR /usr/src/app
+COPY package.json /usr/src/app/
+RUN yarn config set registry "https://registry.npm.taobao.org/"
+RUN yarn install
+COPY . /usr/src/app
+EXPOSE 7001
+CMD [ "yarn", "docker" ]