Update readme

Author: verdimrc

README.md

@@ -54,6 +54,9 @@ your notebook instance enables
 [root access for notebook users](https://aws.amazon.com/blogs/machine-learning/control-root-access-to-amazon-sagemaker-notebook-instances/), and
 **\[Need internet\]** requires internet connection.
 
+- **\[Need sudo & internet\]** [code-server](https://github.com/coder/code-server) and opinionated
+  extensions for Python data science works.
+
 - **\[Need sudo & internet\]** Docker: enable SageMaker local mode, and advance docker customizations.
   See [here](#53-docker-tweaks) for details, and how to disable.
   - Please note that you may need to increase your notebook instance's EBS to make sure that the

initsmnb/TEMPLATE-setup-my-sagemaker.sh

@@ -126,9 +126,7 @@ echo -e "
 Waiting for these jobs to complete...
 $(jobs)
 
-Usually they take ${COLOR_RED}~4 minutes${COLOR_OFF} to ${COLOR_RED}5+ minutes${COLOR_OFF}. The high-side is typically the first
-time ever running initsmnb on a notebook instance, with more stuffs to install.
-The lower-side is for subsequent initsmnb runs (typically on notebook restart).
+They may take ${COLOR_RED}~4 minutes${COLOR_OFF} (on ml.t3.medium in ap-southeast-1 / Singapore).
 
 Job logs:
 $(ls -al ~/INITSMNB-*.txt)