Update about page

about.md

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 This site hosts material meant for CyberInfrastructure Training and
-Education for Synchrotron X-Ray Science (X-CITE).
+Education for Synchrotron X-Ray Science (X-CITE). X-CITE is developed
+for the community of scientists and researchers using the [CHESS]
+synchrotron X-ray facility and similar light sources.
 
 
 # About this site
 
 The sources of this site are available at
 <https://github.com/RENCI-NRIG/X-CITE>.
 
-This site is generated using Quarto. To learn more about Quarto
-websites visit <https://quarto.org/docs/websites>.
+The content in this website is available under [Creative Commons
+Attribution-ShareAlike 4.0 International][cc-by-sa] license.  Code
+snippets may be used under [CC0 1.0 Universal][cc-zero] license.
+
+Copyrights for logos are owned by the respective organizations.
+
+This site is generated using [Quarto].
+
+<!-- References -->
+[CHESS]: https://www.chess.cornell.edu/
+
+[cc-by-sa]: https://creativecommons.org/licenses/by-sa/4.0/
+[cc-zero]: https://creativecommons.org/publicdomain/zero/1.0/
+
+[Quarto]: https://quarto.org/