update readme

Author: jh-488

README.md

@@ -221,6 +221,10 @@ __`--scorm-embed`__
 
 Embed the Markdown source directly into the JavaScript code. Use this for Moodle 4 and other LMS that impose restrictions on dynamic loading of external resources.
 
+__`--lia-subfolder`__
+
+Place course files (Markdown, images, audio, etc.) into a `content/` subfolder, keeping LiaScript app files at the root. Automatically implies `--scorm-embed` for LMS compatibility.
+
 ### SCORM2004
 
 This output format provides the same settings as `scorm1.2`, but it allows to
@@ -295,6 +299,8 @@ reload the course, all quiz and coding states are destroyed. By using this
 option a course is generated, which stores the content within the browsers local
 `indexeddb`.
 
+__`--lia-subfolder`:__ Place course files (Markdown, images, audio, etc.) into a `content/` subfolder, keeping LiaScript app files at the root.
+
 ``` shell
 $ liaex -i project/README.md --format ims --output course --ims-indexeddb
 ..
@@ -702,6 +708,8 @@ $ liaex -i project/README.md --format xapi --output course
 
 `--xapi-zip` Package the output as a zip file.
 
+`--lia-subfolder` Place course files (Markdown, images, audio, etc.) into a `content/` subfolder, keeping LiaScript app files at the root.
+
 ### Project
 
 Projects are a way to bundle a collection of courses and to make a custom overview page for it.