Set and use environment variable JUPYTER_PORT

base/conf/jupyter/etc/jupyter/jupyter_server_config.py

@@ -11,7 +11,6 @@ from jupyter_core.paths import jupyter_data_dir
 
 c = get_config()  # noqa: F821 # type: ignore
 c.ServerApp.ip = "0.0.0.0"
-c.ServerApp.port = 8888
 #c.ServerApp.open_browser = False
 
 # https://github.com/jupyter/notebook/issues/3130

base/latest.Dockerfile

@@ -500,7 +500,10 @@ RUN sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master
 COPY --from=files /files /
 COPY --from=files /files/var/backups/skel ${HOME}
 
-EXPOSE 8888
+ARG JUPYTER_PORT=8888
+ENV JUPYTER_PORT=${JUPYTER_PORT}
+
+EXPOSE $JUPYTER_PORT
 
 ## Configure container startup
 ENTRYPOINT ["tini", "-g", "--", "start.sh"]