Rex UI help text improvement (#1178)

public/v4/apps/silex-platform.yml

@@ -50,17 +50,20 @@ caproverOneClickApp:
           description: Your client-secret for your other gitlab instance app
     instructions:
         start: |-
+
             Silex, is a free and open source website builder in the cloud.
-            Create websites directly in the browser without writing code.
-            And it is suitable for professional designers to produce great websites without constraints.
-            Silex is also known as the HTML5 editor.
+            Create websites directly in the browser without writing code. 
+            And it is suitable for professional designers to produce great websites without constraints. 
+            Silex is also known as the HTML5 editor. 
+
+            You are installing a Docker image generated from this silex-platform source code https://github.com/silexlabs/silex-platform 
+            For your Gitlab App client id and secret and your redirect URL see https://github.com/silexlabs/silex-platform?tab=readme-ov-file#environment-variables
+            For environment variables definition, see https://docs.silex.me/en/dev/options 
 
-            More details: https://silex.me/
-            For environment variables definition, see https://docs.silex.me/en/dev/options
+            More details: https://silex.me/ 
 
-            NB: 
-            You can selfhost your gitlab instance too so that you will have a full selfhosted web builder.
-            You probably want to use a CMS like Wordpress or others, you can also selfhost it.
+            NB: You can selfhost your gitlab instance too so that you will have a full selfhosted web builder. 
+            You probably want to use a CMS like Wordpress or others, you can also selfhost it. 
             See https://docs.silex.me/en/user/cms
 
         end: |-