fix: set upstream in sync handler, cleanup docs around setting up github

Jacky Zhao

2023-12-15 c35818c336e64e43c54766a670e03cd165b59503

 quartz/components/styles/darkmode.scss

@@ -21,6 +21,14 @@
  }
}

:root[saved-theme="dark"] {
  color-scheme: dark;
}

:root[saved-theme="light"] {
  color-scheme: light;
}

:root[saved-theme="dark"] .toggle ~ label {
  & > #dayIcon {
    opacity: 0;