added image of webapp

README.md

@@ -7,6 +7,7 @@ Predict force maps from bright-field microscopy images of single-cell or spheroi
 ## Ways to Use S2F
 
 ### 1. Web App (local)
+
 Run the Streamlit GUI from `S2FApp/`:
 ```bash
 git clone https://github.com/Angione-Lab/Shape2Force.git

S2FApp/README.md

@@ -15,6 +15,10 @@ app_port: 8501
 
 # Shape2Force (S2F) App
 
+<p align="center">
+  <img src="res/webapp.png" width="450" alt="Shape2Force Web App" />
+</p>
+
 Predict force maps from bright-field microscopy images using deep learning. 
 
 ## Quick Start