diff --git a/README.md b/README.md
index 6f65bbefbd031ef4e599bc9cd14e1f443fa59d62..4892069d71315d79e0d8b103cc85299050d1b3e3 100644
--- a/README.md
+++ b/README.md
@@ -13,10 +13,20 @@ o424104.ingest.sentry.io
 ```
 
 4. (maybe u need to update the location code?)
-5. clear storage for wash connect app, enter laundry room, open the app, login with random password, start the washing machine
+5. clear storage for wash connect app, **enter laundry room before open the app**, login with random password, start the washing machine
 6. when the washing machine is started, close the app and clear storage.
 
 ## docker image
 
-Read dockerfile
+Read dockerfile, start the docker container on your vps.
+
+On your phone, access `YOUR_SERVER_IP:8000`, read `_a_help.html` to setup dns, download crt & apk, and complete the setup.
+
+go with step 5.
+
+## WARNING
+
+You might have to update the location code, to make it working for your laundry room.
+
+Refer to `httpd*.py` to learn how to update them.