docs: add DOI badge and restore CITATION.cff

Author: jt14den

CITATION.cff

@@ -0,0 +1,51 @@
+cff-version: 1.2.0
+message: "If you use this software, please cite it as below."
+type: software
+title: "Lessons for Librarians in Open Science Principles and Methods"
+version: 1.0.6
+doi: 10.5281/zenodo.18055759
+date-released: "2025-12-23"
+repository-code: "https://github.com/ucla-imls-open-sci/ucla-imls-open-sci.github.io"
+url: "https://ucla-imls-open-sci.info"
+authors:
+  - family-names: Dennis
+    given-names: Tim
+    orcid: "https://orcid.org/0000-0001-6632-3812"
+    affiliation: "University of California, Los Angeles"
+  - family-names: McAulay
+    given-names: Elizabeth
+    orcid: "https://orcid.org/0000-0002-8679-9727"
+    affiliation: "University of California, Los Angeles"
+  - family-names: Yao
+    given-names: Zhiyuan
+    orcid: "https://orcid.org/0000-0002-7601-8704"
+    affiliation: "University of California, Los Angeles"
+  - family-names: Erdmann
+    given-names: Christopher
+    orcid: "https://orcid.org/0000-0003-2554-180X"
+    affiliation: "SciLifeLab"
+  - family-names: Grappone
+    given-names: Todd
+    orcid: "https://orcid.org/0000-0003-2218-7200"
+    affiliation: "University of California, Santa Barbara"
+  - family-names: Huang
+    given-names: Zikang
+    orcid: "https://orcid.org/0009-0007-9906-6067"
+    affiliation: "University of California, Los Angeles"
+  - family-names: Lee
+    given-names: Lawrence
+    orcid: "https://orcid.org/0000-0003-1529-2002"
+    affiliation: "University of California, Los Angeles"
+  - family-names: Kim
+    given-names: Madeline
+    orcid: "https://orcid.org/0000-0002-2213-201X"
+    affiliation: "University of California, Los Angeles"
+abstract: "A comprehensive, open-source curriculum hub for librarians covering Open Science principles, data management, and reproducibility. Funded by IMLS."
+keywords:
+  - open science
+  - librarians
+  - curriculum
+  - data management
+  - reproducibility
+  - IMLS
+license: CC-BY-4.0

README.md

@@ -1,5 +1,7 @@
 # Open Science for Librarians
 
+[![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.18055759.svg)](https://doi.org/10.5281/zenodo.18055759)
+
 This is the official website for the "Lessons for Librarians in Open Science Principles and Methods" project, funded by the Institute of Museum and Library Services (IMLS).
 
 ## Project Overview