Update README.md

README.md

@@ -51,4 +51,4 @@ The app is currently hosted on Microsoft Azure. Specifically:
 
 To deploy your own instance, follow the [tutorial for Django app + PostGreSQL deployment](https://docs.microsoft.com/en-us/azure/app-service/tutorial-python-postgresql-app?tabs=django%2Cwindows%2Cvscode-aztools%2Cterminal-bash%2Cazure-portal-access%2Cvscode-aztools-deploy%2Cdeploy-instructions-azportal%2Cdeploy-instructions--zip-azcli%2Cdeploy-instructions-curl-bash) but using this app instead of the sample app.
 
-Make sure you specify the following environment variables in the App Service configuration: `DBHOST`, `DBNAME`, `DBPASS`, `DBUSER`. The previously linked tutorial shows how to set these.
+Make sure you specify the following environment variables in the App Service configuration: `SECRET_KEY`, `DBHOST`, `DBNAME`, `DBPASS`, `DBUSER`. The previously linked tutorial shows how to set these.