diff --git a/dockerfiles/mate-tool-env/Dockerfile b/dockerfiles/mate-tool-env/Dockerfile
new file mode 100644
index 0000000..0264738
--- /dev/null
+++ b/dockerfiles/mate-tool-env/Dockerfile
@@ -0,0 +1 @@
+FROM java
diff --git a/dockerfiles/mate-tool-env/README.md b/dockerfiles/mate-tool-env/README.md
index f038722..6a721f7 100644
--- a/dockerfiles/mate-tool-env/README.md
+++ b/dockerfiles/mate-tool-env/README.md
@@ -1 +1,6 @@
 We'll need java.
+
+Run from root of this repo:
+```bash
+$ docker run -it -v .:/root/ k-java /bin/bash
+```