anchor.diff:  # http-server
   RUN npm install -g http-server
   
  -# npm
  +# typescript
   RUN npm install -g typescript
  -
  -# Docker
  -#RUN curl -fsSL https://download.docker.com/linux/ubuntu/gpg | apt-key add -
  -#RUN add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
  -#RUN apt-get update
  -#RUN apt-get -y install docker-ce
   
   # sudo
   RUN apt-get -y install sudo
  
positive.code: RUN apt-get install -y software-properties-common && apt-get install -y --no-install-recommends apt-utils
  
  # Install Kurento Media Server (KMS)
  RUN echo "deb http://ubuntu.openvidu.io/6.7.0 xenial kms6" | tee /etc/apt/sources.list.d/kurento.list \
  	&& apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 5AFA7A83 \
  	&& apt-get update \
  	&& apt-get -y dist-upgrade \
  
negative.code: FROM ubuntu:16.04
  
  LABEL maintainer="openvidu@gmail.com"
  
  USER root
  
  