diff --git a/README.md b/README.md
index a611d62781e7c6bfda9ea7748ef0b2905e9dcc4a..37bf8ccf3e9bbb79d9b8ebcc4f6ff80b1b5f7a7c 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,9 @@ Run client and server concurrently:
 
 ## Deploy with Docker
 
+Note: the Docker container is meant to run on a server (NODE_ENV=production). If you want
+to run it on localhost, the API url needs to be changed in `src/client/epics/index.js`.
+ 
 ### Build
  `docker build -t mmm-web-app-c .`