font size change

app.py

@@ -349,7 +349,15 @@ def annotate_cyclic_structure(mol, sequence):
     # Convert to PIL Image
     img = Image.open(BytesIO(drawer.GetDrawingText()))
     draw = ImageDraw.Draw(img)
-    small_font = ImageFont.load_default()
+    try:
+        small_font = ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf", 60)
+    except OSError:
+        try:
+            small_font = ImageFont.truetype("arial.ttf", 60)
+        except OSError:
+            # If no TrueType fonts are available, fall back to default
+            print("Warning: TrueType fonts not available, using default font")
+            small_font = ImageFont.load_default()
     
     # Add just the sequence header at the top
     seq_text = f"Sequence: {sequence}"