test adding citation file

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

Author: vsoch

CITATION.cff

@@ -0,0 +1,9 @@
+cff-version: 1.1.0
+message: "If you use this software, please cite it as below."
+authors:
+  - family-names: Sochat
+    given-names: Vanessa
+    orcid: https://orcid.org/0000-0002-4387-3819
+title: "Collaborative Container Modules with Singularity Registry HPC"
+doi: 10.21105/joss.03311
+date-released: 2021-07-20