tiny English improvements 5, commas

- comma ... no comma in front of "for"
- which, which   ... repetitive, improved
- comma
- instructions to install ==> installation instructions
- another comma

node_client.asciidoc

@@ -107,20 +107,20 @@ code
 
 ==== Installing Docker
 
-Before we begin, you should install the docker container system on your computer. Docker is an open system that is distributed for free as a _Community Edition_, for many different operating systems including Windows, Mac OS and Linux. The Windows and Mac versions are called _Docker Desktop_, which is GUI desktop application and command-line tools, and the Linux version is called _Docker Engine_, which is a server daemon and command-line tools. We will be using the command-line tools, which are identical across all platforms.
+Before we begin, you should install the docker container system on your computer. Docker is an open system that is distributed for free as a _Community Edition_ for many different operating systems including Windows, Mac OS and Linux. The Windows and Mac versions are called _Docker Desktop_ and consist of a GUI desktop application and command-line tools. The Linux version is called _Docker Engine_ and is comprised of a server daemon and command-line tools. We will be using the command-line tools, which are identical across all platforms.
 
 Go ahead and install Docker for your operating system by following the instructions to _"Get Docker"_ from the Docker website found here:
 
 https://docs.docker.com/get-docker/
 
-Select your operating system from the list, and follow the instructions to install.
+Select your operating system from the list and follow the installation instructions.
 
 [TIP]
 ====
-If you install on Linux, follow the post-installation instructions to ensure you can run Docker as a regular user instead of root. Otherwise, you will need to prefix the +docker+ command with +sudo+, running it as root like: +sudo docker+.
+If you install on Linux, follow the post-installation instructions to ensure you can run Docker as a regular user instead of user _root_. Otherwise, you will need to prefix all +docker+ commands with +sudo+, running them as root like: +sudo docker+.
 ====
 
-Once you have Docker installed, you can test your installation by running the demo container +hello-world+, like this:
+Once you have Docker installed, you can test your installation by running the demo container +hello-world+ like this:
 
 [docker-hello-world]
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