fix BASE_IMAGE arg in onbuild

BASE_IMAGE is a single arg, not two separate ones
jupyterhub · Dec 3, 2019 · ca81af2 · ca81af2
1 parent 5502367
commit ca81af2
Showing 1 changed file with 2 additions and 3 deletions.
diff --git a/onbuild/Dockerfile b/onbuild/Dockerfile
@@ -4,9 +4,8 @@
 #
 # Derivative images must have jupyterhub_config.py next to the Dockerfile.
 
-ARG BASE_IMAGE=jupyterhub/jupyterhub
-ARG BASE_IMAGE_TAG=latest
-FROM "${BASE_IMAGE}:${BASE_IMAGE_TAG}"
+ARG BASE_IMAGE=jupyterhub/jupyterhub:latest
+FROM $BASE_IMAGE
 
 ONBUILD COPY jupyterhub_config.py /srv/jupyterhub/jupyterhub_config.py