Update README.md

Added contact information

README.md

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     "redirectUri": "{redirect uri}"
   }
   ```
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+## Questions and Contributions
+Questions about the project can be asked in the [Da Vinci Formulary stream on the FHIR Zulip Chat](https://chat.fhir.org/#narrow/stream/197730-Da-Vinci-PDex-Drug-Formulary).
+
+This project welcomes Pull Requests. Any issues identified with the RI should be submitted via the [GitHub issue tracker](https://github.com/HL7-DaVinci/drug-formulary-ri/issues).
+
+As of October 1, 2022, The Lantana Consulting Group is responsible for the management and maintenance of this Reference Implementation.
+In addition to posting on FHIR Zulip Chat channel mentioned above you can contact [Corey Spears](mailto:[email protected]) for questions or requests.