Update index.md

Author: melonora

docs/index.md

@@ -1,5 +1,19 @@
 # pertpy
 
+[//]: # (numfocus-fiscal-sponsor-attribution)
+
+pertpy is part of the scverse® project ([website](https://scverse.org), [governance](https://scverse.org/about/roles)) and is fiscally sponsored by [NumFOCUS](https://numfocus.org/).
+If you like scverse® and want to support our mission, please consider making a tax-deductible [donation](https://numfocus.org/donate-to-scverse) to help the project pay for developer time, professional services, travel, workshops, and a variety of other needs.
+
+<div align="center">
+<a href="https://numfocus.org/project/scverse">
+  <img
+    src="https://raw.githubusercontent.com/numfocus/templates/master/images/numfocus-logo.png"
+    width="200"
+  >
+</a>
+</div>
+
 ```{eval-rst}
 .. card:: Installation :octicon:`plug;1em;`
     :link: installation