Use Ubuntu LTS to avoid issues with R

R says it’s only supporting 22.04.

Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:23.04
+FROM ubuntu:22.04
 # this allows the setup to ignore all of the ubuntu OS setup
 # thats not needed for this docker image (Time Zone for example)
 ARG DEBIAN_FRONTEND=noninteractive
@@ -10,11 +10,13 @@ ENV TZ=UTC
 RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
 
 # Add Node.js repo
-RUN curl -sL https://deb.nodesource.com/setup_19.x | bash -
+RUN curl -sL https://deb.nodesource.com/setup_20.x | bash -
 
-RUN sh -c 'echo "deb http://cloud.r-project.org/bin/linux/debian bullseye-cran40/" > /etc/apt/sources.list.d/r-project.list' && \
-    apt-key adv --keyserver keyserver.ubuntu.com --recv-key '95C0FAF38DB3CCAD0C080A7BDC78B2DDEABC47B7'
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends software-properties-common dirmngr
 
+RUN curl -sL https://cloud.r-project.org/bin/linux/ubuntu/marutter_pubkey.asc | tee -a /etc/apt/trusted.gpg.d/cran_ubuntu_key.asc
+RUN add-apt-repository "deb https://cloud.r-project.org/bin/linux/ubuntu $(lsb_release -cs)-cran40/"
 
 # R, Node.js, PostgreSQL, headers for R packages
 RUN apt-get update && apt-get install -y \