diff --git a/README.md b/README.md
index dbc3a31..0eab6a3 100644
--- a/README.md
+++ b/README.md
@@ -38,6 +38,7 @@ JavasScript (React + Redux)
 ## DOCKER
 
 - install docker-ce and docker-compose
+- Check env variables in php.dockerfile in root directory of project (for local testing, REACT_APP_DEV_URL should be set to http://localhost:8000/api-wiaas)
 - from root of the project, execute `docker-compose build` and then `docker-compose up`
 
 Application is now available on http://localhost:8000
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