add pipeline schema

README.md

@@ -25,6 +25,8 @@ It is split into two workflows for now, named `hicpro` and `hicstuff`.
 8. TADs calling ([`HiCExplorer`](https://github.com/deeptools/HiCExplorer), [`cooltools`](https://cooltools.readthedocs.io/en/latest/))
 9. Quality control report ([`MultiQC`](https://multiqc.info/))
 
+![pipeline schema](docs/images/metahic_schema_crop.png)
+
 ## Workflow summary (hicstuff)
 1. Hi-C data préparation
 2. Processing