docs: Readme adapted to changes.

README.md

@@ -1,22 +1,31 @@
 # Node.js Linux Installer
 This is a universal Node.js installer for Linux. The [original project by taaem](https://github.com/taaem/nodejs-linux-installer) required some fixes to maintain functionality, which are contained in this fork, together with a few enhancements.
 
-[![CodeFactor](https://www.codefactor.io/repository/github/michaing/nodejs-linux-installer/badge)](https://www.codefactor.io/repository/github/michaing/nodejs-linux-installer)
-
 The following architectures are currently supported:
 - ARMv6 (armv6l)
 - ARMv7 (armv7l)
 - ARMv8 (aarch64)
 - x86 64-bit (x86_64)
 - x86 32-bit (i386, i486, i586, i686)
-- further architectures from nodejs.org's unofficial builds at unofficial-builds.nodejs.org
+- further architectures from [nodejs.org's unofficial builds](unofficial-builds.nodejs.org).
 
 **I don't take any responsibilities if you blow your system up!**
 
-### Installing
-```
-curl -sSf https://raw.githubusercontent.com/MichaIng/nodejs-linux-installer/master/node-install.sh | bash
-```
+### Usage
+Please be aware, that installation of node requires root privileges. The script will ask for sudo credentials before installation.
+
+Get the help text:
+
+    curl -sSf https://raw.githubusercontent.com/ollliegits/nodejs-linux-installer/master/node-install.sh | bash -s -- --help
+
+Show a list of all unofficial releases for your CPU architecture available from nodejs.org :
+
+    curl -sSf https://raw.githubusercontent.com/ollliegits/nodejs-linux-installer/master/node-install.sh | bash -s -- --list-unofficial-releases
+
+Install unofficial release of node.js with `<version>`:
+
+    curl -sSf https://raw.githubusercontent.com/ollliegits/nodejs-linux-installer/master/node-install.sh | bash -s -- --unofficial-version <version>
+
 
 ### Contributing
 Just create a fork and please contribute all your improvements back here!