diff --git a/Dockerfile b/Dockerfile
index 0d9fb6f..0550477 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -16,7 +16,7 @@
 #######################################################################################################
 # Base image from JupyterLab
 #######################################################################################################
-ARG BASE_IMAGE=jupyter/base-notebook
+ARG BASE_IMAGE=quay.io/jupyter/base-notebook
 ARG BASE_TAG=latest
 FROM ${BASE_IMAGE}:${BASE_TAG}
 
diff --git a/README.md b/README.md
index 7c7ea00..cfbb35b 100644
--- a/README.md
+++ b/README.md
@@ -84,7 +84,7 @@ There is also
 that one can interact with (make a copy first) — if the link doesn't work (Google Drive sharing publicly
 is odd), [download it from GitHub](examples/google_colab_demo.ipynb) and upload it to Google's Colab.
 
-Finally, because it's compiled and not intepreted, it has a slightly different "semantic" than the Python kernels.
+Finally, because it's compiled and not interpreted, it has a slightly different "semantic" than the Python kernels.
 It's highly recommended quickly browsing through the [**tutorial**](examples/tutorial.ipynb).
 
 ## Installation
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index b32be5e..2cd598a 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -7,6 +7,7 @@
   * Added sudo for apt install and apt update.
   * Added support for `autostart.sh` that if present in the mounted container `/notebooks` directory, and if root owned
     and set as executable.
+* Updated Dockerfile to latest version to JupyterLab -- now the base docker is served `quay.io/jupyter/base-notebook`
 
 ## v0.10.5, Added SendAsDownload
 
diff --git a/docs/docker.md b/docs/docker.md
index 9edd0d3..18f9f46 100644
--- a/docs/docker.md
+++ b/docs/docker.md
@@ -1,8 +1,16 @@
 # Docker Customization
 
-If the container you run `gonb` needs some custom initialization, and you don't want to simply edit the dockerfile and
-create your own docker, just create the file `autostart.sh` in the directory mounted under `/notebooks` in the container,
-owned by `root` and with executable permissions, and it will be executed at start up of the container by default.
+1. The docker runs _JupyterLab_ and _GoNB_ under the user `$NB_USER` (== "jovyan").
+2. It has configured `sudo` privileges for `apt update` and `apt install *`. So a cell with 
+   `!sudo apt install <my_package>` will work, and install your package.
+3. One can always create another docker based on `janpfeifer/gonb_jupyterlab@latest`
+4. Create an `autostart.sh` script, see next section.
+
+## Customization with `autostart.sh`
+
+If you create the file `autostart.sh` in the directory mounted under `/notebooks` in the container,
+**owned by `root` and with executable permissions**, it will be executed at start up of the container by default
+**as `root`**.
 
 This allows you to download/install databases, or set up credentials, etc.