Update README.md (#36918)

ampproject · Nov 12, 2021 · 75e1dbd · 75e1dbd
1 parent 504411b
commit 75e1dbd
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/validator/README.md b/validator/README.md
@@ -129,11 +129,11 @@ Now `cd amphtml/validator` and run `python build.py`.
 In the case the test passes in your local machine but fails in Circle CI,
 you can use docker to reproduce the test errors.
 
-1. Start an interactive docker container
+1. Start an interactive docker container. Note that you will be the `root` user inside the docker container.
     ```bash
-    docker run -it node:lts-buster bash
+    docker run -it -u root cimg/openjdk:17.0-node bash
     ```
-1. Run following commands in the container. Note that you are already the `root` user inside the docker container.
+1. Run following commands in the container.
     ```bash
     apt update
     apt install -y sudo