Merge pull request #1033 from romainx/bump_ubuntu

Bump Ubuntu Base Image

Author: parente

base-notebook/Dockerfile

@@ -3,7 +3,8 @@
 
 # Ubuntu 18.04 (bionic)
 # https://hub.docker.com/_/ubuntu/?tab=tags&name=bionic
-ARG ROOT_CONTAINER=ubuntu:bionic-20200112@sha256:bc025862c3e8ec4a8754ea4756e33da6c41cba38330d7e324abd25c8e0b93300
+# OS/ARCH: linux/amd64
+ARG ROOT_CONTAINER=ubuntu:bionic-20200219@sha256:0925d086715714114c1988f7c947db94064fd385e171a63c07730f1fa014e6f9
 ARG BASE_CONTAINER=$ROOT_CONTAINER
 FROM $BASE_CONTAINER