Improve html attributes for accessibility

app.py

@@ -263,27 +263,27 @@ def plot_server(input, output, session, r):
 def server(input, output, session: Session):
     @render.image
     def rbg_kew():
-        img = {"src": "assets/rbg_kew.jpg"}
+        img = {"src": "assets/rbg_kew.jpg", 'aria-label':'Royal Botanic Gardens, Kew logo'}
         return img
 
     @render.image
     def bloomberg():
-        img = {"src": "assets/bloomberg_philanthropies.jpg"}
+        img = {"src": "assets/bloomberg_philanthropies.jpg", 'aria-label':'Bloomberg Philanthropies logo'}
         return img
 
     @render.image
     def brin():
-        img = {"src": "assets/brin.jpg"}
+        img = {"src": "assets/brin.jpg", 'aria-label':'Badan Riset Dan Inovasi Nasional logo'}
         return img
 
     @render.image
     def abg():
-        img = {"src": "assets/abg.png"}
+        img = {"src": "assets/abg.png", 'aria-label':'Atlantic Botanical Garden logo'}
         return img
 
     @render.image
     def logo_image():
-        img = {"src": "assets/logo3.png", "height": "100px", "width": "138px", 'alt': 'OrchAId'}
+        img = {"src": "assets/logo3.png", "height": "100px", "width": "138px", 'alt': 'OrchAId', 'aria-label':'OrchAId logo'}
         return img
 
     analysis_results = reactive.Value([])