add usage explanation

README.md

@@ -11,6 +11,9 @@ My main goal is to provide a unique interface for several generic IDE to manipul
 I am used by the following client extensions:
 
 - [vscode-pharo](https://github.com/badetitou/vscode-pharo)
+- [vscode-eclipse](https://github.com/badetitou/eclipse-pharo) *Really only a POC. But you might be interested to have a look at it.*
+
+> If you experiement with other IDE, do not hesitate to contact us in an Issue :)
 
 ## Features
 
@@ -35,7 +38,6 @@ Most of the features are available for both formats.
 
 ## Installation
 
-
 Execute this code in any Pharo10/11 Image
 
 ```Smalltalk
@@ -44,3 +46,39 @@ Metacello new
   baseline: 'PharoLanguageServer';
   load
 ```
+
+> Or download a pre-existing image in the [release](https://github.com/badetitou/Pharo-LanguageServer/releases) section.
+
+## Usage
+
+Once you have an image with the project installed, you can run it using
+
+```sh
+/path/to/vm/pharo [--headless] /path/to/pls.image st /path/to/run-server.st
+```
+
+In above example, we used an another file named `run-server.st` that is used to define the Pharo script that run the code.
+You can find the definition of this file for the [vscode extension](https://github.com/badetitou/vscode-pharo/blob/main/res/run-server.st) and for the [eclipse extension](https://github.com/badetitou/eclipse-pharo/blob/main/res/run-server.st).
+
+Basically the file looks like this
+
+```st
+| server |
+"Stop and reset potential existing instance in the image you start"
+PLSServer reset.
+"Create a new Language Server"
+server := PLSServer new.
+"Start the new language server"
+server start.
+```
+
+By default, the server will start a socket and give you the port of the opened socket in the standard output.
+If you want to use standard input/ouput to deal with communication, you can use the folowing option:
+
+```st
+server := PLSServer new
+  withStdIO: true;
+  yourself
+```
+
+> This option is less tested and might create bug with Pharo writing to the standard output for other reason