Add data dictionary and reuse rules section

Added a section for data dictionary and reuse rules.

Author: DanWeinberger

README.md

@@ -1,6 +1,9 @@
 ## Where can I learn more about the data and processing
 Documentation for our databases can be found on our [Process documentation](https://pophive.github.io/processing-documentation/) page
 
+## Data dictionary and rules for re-use for individual datasets
+https://pophive.github.io/Ingest/
+
 ## See the data flows and relationships
 https://github.com/PopHIVE/Ingest/blob/main/status.md