Register CAT pipeline dataset

.datalad/config

@@ -1,2 +1,5 @@
 [datalad "dataset"]
 	id = 496fecdf-43d2-4679-8947-92d2ed4abdeb
+[datalad "containers.cat12-8-1"]
+	image = code/pipeline/cat12.8.1_r2042.simg
+	cmdexec = singularity exec -B {{pwd}} --cleanenv {img} {cmd}