readme warns about license conflict

related #2

README.md

@@ -1,5 +1,8 @@
 # GLAM
 
+> [!CAUTION]
+> Dependency PyMuPDF with AGPL-3.0 license is extensively used in the code and requires to use AGPL-3.0 license, see https://github.com/ivanstepanovftw/glam/issues/2
+
 Graph-based Layout Analysis Model (GLAM) is a deep learning model for document layout analysis.
 
 Unofficial implementation in PyTorch of "A Graphical Approach to Document Layout Analysis" [[arXiv]](https://arxiv.org/abs/2308.02051).
@@ -90,6 +93,9 @@ python dln_glam_inference.py
 
 ## License
 
+> [!CAUTION]
+> Dependency PyMuPDF with AGPL-3.0 license is extensively used in the code and requires to use AGPL-3.0 license, see https://github.com/ivanstepanovftw/glam/issues/2
+
 Licensed under either of
 
 * Apache License, Version 2.0, ([LICENSE-APACHE-2.0](LICENSE-APACHE-2.0) or http://www.apache.org/licenses/LICENSE-2.0)