How can I run docker inside the docker

Hi All,

I created a docker:
'----------------------------

Docker for node

FROM node:8
RUN apt-get update
ENV DEBIAN_FRONTEND noninteractive
RUN apt-get -y install apt-transport-https ca-certificates curl gnupg2 software-properties-common
RUN curl -fsSL https://download.docker.com/linux/$(. /etc/os-release; echo "ID")/gpg > /tmp/dkey; apt-key add /tmp/dkey && \ add-apt-repository \ "deb [arch=amd64] https://download.docker.com/linux/(. /etc/os-release; echo “ID") \ (lsb_release -cs)
stable”
RUN apt-get update
RUN apt-get -y install docker-ce
'-----------------------------

as you can see docker installed, but after I execute inside the docker … check procedure I’ve got the following:
'------------------------------
root@0263ebd9efcb:/# docker run hello-world
docker: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?.
See ‘docker run --help’.
'------------------------------

Please help