feat: bump to Ubuntu 22.04 base image

Author: alee

Dockerfile

@@ -1,5 +1,5 @@
-FROM phusion/baseimage:focal-1.1.0
-LABEL maintainer="CoMSES Net <comses-dev@googlegroups.com>"
+FROM phusion/baseimage:jammy-1.0.0
+LABEL maintainer="CoMSES Net <support@comses.net>"
 
 RUN apt-get update && apt-get upgrade -y -o Dpkg::Options::="--force-confold" && apt-get install -y python3-pip \
     && pip3 install nltk --no-cache-dir \

README.md

@@ -1,2 +1,12 @@
 # docker-base
 Base Dockerfile for CoMSES Net images, extends from https://github.com/phusion/baseimage-docker
+
+Using the phusion baseimage-docker image for runit support and other rationale detailed in their README
+
+Latest release targets Ubuntu 22.04
+
+Also installs the basic Python natural language toolkit (NLTK) data for stopwords and punkt
+
+- https://www.nltk.org/data.html
+- https://www.nltk.org/_modules/nltk/tokenize/punkt.html
+