add upload image

app.py

@@ -70,7 +70,11 @@ with open("models/model.p", "rb") as f:
 st.markdown("<center><h1>Know Your BMI</h1></center>", unsafe_allow_html=True)
 st.caption("<center>Click a photo and the underlying Machine Learning model will predict your BMI</center>", unsafe_allow_html=True)
 
-img_file_buffer = st.camera_input("Click a photo and the underlying Machine Learning model will predict your BMI", label_visibility="hidden")
+# img_file_buffer = st.camera_input("Click a photo and the underlying Machine Learning model will predict your BMI", label_visibility="hidden")
+
+img_file_buffer = st.file_uploader("Upload an image", type=["jpg", "jpeg", "png"])
+if img_file_buffer is None:
+    img_file_buffer = st.camera_input("Or click a photo", label_visibility="hidden")
 
 if img_file_buffer is not None:
     # To read image file buffer as a PIL Image: