Add result image decode

handler.py

@@ -25,4 +25,7 @@ class EndpointHandler():
                   "height": 768,
                   "width": 768}
 
-        return self._pipe(**params).images[0]
+        img = self._pipe(**params).images[0]
+        res = {"status": 200,
+               "image": base64.b64encode(img).decode("utf8")}
+        return res