app.py: allow custom resolutions

app.py

@@ -129,9 +129,9 @@ with gr.Blocks(css=css) as demo:
                             steps = gr.Slider(label="Sampling Steps", minimum=1, maximum=30, value=25, step=1)
 
                     with gr.Row():
-                        with gr.Column(scale=1):
-                            width = gr.Slider(label="Width", minimum=1024, maximum=1024, value=1024, step=8)
-                            height = gr.Slider(label="Height", minimum=1024, maximum=1024, value=1024, step=8)
+                        with gr.Column(label="Resolution - Max: 1MegaPixel" scale=1):
+                            width = gr.Slider(label="Width", minimum=512, maximum=1536, value=1024, step=8)
+                            height = gr.Slider(label="Height", minimum=512, maximum=1536, value=1024, step=8)
 
                         with gr.Column(scale=1):
                             batch_size = gr.Slider(label="Batch Size", maximum=1, value=1)