Made Docker ags same as ENV var names

base-notebook/Dockerfile

@@ -6,9 +6,9 @@
 FROM ubuntu:bionic-20180526@sha256:c8c275751219dadad8fa56b3ac41ca6cb22219ff117ca98fe82b42f24e1ba64e
 
 LABEL maintainer="Jupyter Project <jupyter@googlegroups.com>"
-ARG BUILD_USER="jovyan"
-ARG BUILD_UID="1000"
-ARG BUILD_GID="100"
+ARG NB_USER="jovyan"
+ARG NB_UID="1000"
+ARG NB_GID="100"
 
 USER root
 
@@ -32,9 +32,9 @@ RUN echo "en_US.UTF-8 UTF-8" > /etc/locale.gen && \
 # Configure environment
 ENV CONDA_DIR=/opt/conda \
     SHELL=/bin/bash \
-    NB_USER=$BUILD_USER \
-    NB_UID=$BUILD_UID \
-    NB_GID=$BUILD_GID \
+    NB_USER=$NB_USER \
+    NB_UID=$NB_UID \
+    NB_GID=$NB_GID \
     LC_ALL=en_US.UTF-8 \
     LANG=en_US.UTF-8 \
     LANGUAGE=en_US.UTF-8