add missing source OCI image label metadata

Signed-off-by: strawberry <[email protected]>

nix/pkgs/oci-image/default.nix

@@ -36,6 +36,7 @@ dockerTools.buildLayeredImage {
       "org.opencontainers.image.documentation" = "https://conduwuit.puppyirl.gay/";
       "org.opencontainers.image.licenses" = "Apache-2.0";
       "org.opencontainers.image.revision" = inputs.self.rev or inputs.self.dirtyRev or "";
+      "org.opencontainers.image.source" = "https://github.com/girlbossceo/conduwuit";
       "org.opencontainers.image.title" = main.pname;
       "org.opencontainers.image.url" = "https://conduwuit.puppyirl.gay/";
       "org.opencontainers.image.vendor" = "girlbossceo";