Add width and height

Signed-off-by: Aisuko <urakiny@gmail.com>

app.py

@@ -7,7 +7,7 @@ def dummy(img):
 
 with gr.Blocks() as demo:
   with gr.Row():
-    img = gr.Image(tool="sketch", label="base image", show_label=True)
+    img = gr.Image(tool="sketch", label="base image", width=512, height=512, show_label=True)
     img1 = gr.Image()
     img2 = gr.Image(label="mask image", show_label=True)
   btn = gr.Button()