strip animation from uploaded avatar

app/routes/users.py

@@ -28,6 +28,8 @@ bp = Blueprint("users", __name__, url_prefix = "/users/")
 def validate_and_create_avatar(input_image, filename):
     try:
         with Image(blob=input_image) as img:
+            if hasattr(img, 'sequence') and len(img.sequence) > 1:
+                img = Image(image=img.sequence[0])
             img.strip()
             img.gravity = 'center'