diff --git a/Dockerfile b/Dockerfile
index 5f1f823cc..0ee9e5a51 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -15,4 +15,7 @@ COPY ./build .
 # Run the container under "node" user by default
 USER node
 
+# Set NODE_ENV env variable to "production" for faster expressjs
+ENV NODE_ENV production
+
 CMD [ "node", "server.js" ]