docker.md: Remove stray newlines and simplify sentences (#1911)

docs/gemstones/containers/docker.md

@@ -21,21 +21,20 @@ sudo dnf config-manager --add-repo https://download.docker.com/linux/centos/dock
 
 ## Install the needed packages
 
-Install the latest version of Docker Engine, containerd, and Docker Compose, by running:
+Install the latest version of Docker Engine, `containerd`, and Docker Compose, by running:
 
 ```
 sudo dnf -y install docker-ce docker-ce-cli containerd.io docker-compose-plugin
 ```
 
 ## Start and enable the systemd `docker` service (dockerd)
 
-Use the `systemctl` utility to configure the `docker` daemon to automatically startup with the next system reboot and simultaneously start it for the current session. Type:
+Use `systemctl` to configure the `docker` daemon to automatically startup upon reboot and simultaneously start it now. Type:
 
 ```
 sudo systemctl --now enable docker
 ```
 
-
 ### Notes
 
 ```
@@ -44,6 +43,3 @@ docker-ce-cli           : Provides the command line interface (CLI) client docke
 containerd.io           : Provides the container runtime (runc)
 docker-compose-plugin   : A plugin that provides the 'docker compose' subcommand 
 ```
-
-
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