message: build(docker): Dockerfile changed to label a builder image
diff: FROM node:alpine as builder
  +LABEL "csui-builder-image"=1
  +
  COPY . /tmp/cloudstackui
  WORKDIR /tmp/cloudstackui
  -RUN yarn install --verbose \
  +RUN yarn \
  && yarn run build:aot \
  && yarn cache clean \
  && rm -rf node_modules
  