update read markdown function

app.py

@@ -5,7 +5,22 @@ import gradio as gr
 
 def read_markdown(filepath):
     with open(filepath, 'r') as file:
-        return file.read()
+        lines = file.readlines()
+        start_index = None
+        end_index = None
+        for i, line in enumerate(lines):
+            if line.strip() == '---':
+                if start_index is None:
+                    start_index = i
+                else:
+                    end_index = i
+                    break
+        if end_index is None:
+            return ''.join(
+                lines)  # If no end delimiter found, return entire content
+        else:
+            return ''.join(lines[end_index +
+                                 1:])  # Return content after end delimiter
 
 
 local_path = Path(sys.path[0])