Applied suggested changes to create /etc/docker folder instead of starting the service

The "Set up the Docker daemon" step fails because the initial files have not been created. I copied the step of creating of the /etc/docker/ folder from the CentOS/RHEL instructions to the Ubuntu Instructions

content/en/docs/setup/production-environment/container-runtimes.md

@@ -407,6 +407,11 @@ sudo apt-get update && sudo apt-get install -y \
   docker-ce-cli=5:19.03.11~3-0~ubuntu-$(lsb_release -cs)
 ```
 
+```shell
+## Create /etc/docker
+sudo mkdir /etc/docker
+```
+
 ```shell
 # Set up the Docker daemon
 cat <<EOF | sudo tee /etc/docker/daemon.json