doc: update synopsis

Signed-off-by: Augustin Mauroy <97875033+AugustinMauroy@users.noreply.github.com>

Author: AugustinMauroy

doc/api/synopsis.md

@@ -15,15 +15,8 @@ Please see the [Command-line options][] document for more information.
 An example of a [web server][] written with Node.js which responds with
 `'Hello, World!'`:
 
-Commands in this document start with `$` or `>` to replicate how they would
-appear in a user's terminal. Do not include the `$` and `>` characters. They are
-there to show the start of each command.
-
-Lines that don't start with `$` or `>` character show the output of the previous
-command.
-
 First, make sure to have downloaded and installed Node.js. See
-[Installing Node.js via package manager][] for further install information.
+[Installing Node.js][] for further install information.
 
 Now, create an empty project folder called `projects`, then navigate into it.
 
@@ -90,5 +83,5 @@ If the browser displays the string `Hello, World!`, that indicates
 the server is working.
 
 [Command-line options]: cli.md#options
-[Installing Node.js via package manager]: https://nodejs.org/en/download/package-manager/
+[Installing Node.js]: https://nodejs.org/en/download
 [web server]: http.md