Back to using ubuntu 20.04 but install python 3.12

container/Dockerfile

@@ -1,15 +1,15 @@
-FROM python:3.12-slim-bookworm
+FROM ubuntu:20.04
 
 ## Get some karma ##
 MAINTAINER Florian Briegel, [email protected]
 
 RUN apt-get update
 RUN apt-get install -y locales
 
-ENV LANG C.UTF-8
-ENV LC_ALL C.UTF-8
+ENV LANG=C.UTF-8
+ENV LC_ALL=C.UTF-8
 
-ENV DEBIAN_FRONTEND noninteractive
+ENV DEBIAN_FRONTEND=noninteractive
 
 RUN apt update -y && \
     apt install -y wget && \
@@ -32,6 +32,10 @@ RUN apt update -y
 RUN apt-get install -y tan-basda-mocca
 RUN dpkg --purge --force-all python3-astropy
 
+RUN add-apt-repository ppa:deadsnakes/ppa
+RUN apt update -y
+RUN apt install -y python3.12
+
 COPY . lvmtan
 RUN cd lvmtan && pip3 install .