add recipe for Ubuntu 20.04 container with Python 2.7

.github/workflows/build-publish-containers.yml

@@ -28,6 +28,7 @@ jobs:
           - almalinux-8.6
           - almalinux-9.0
           - ubuntu-20.04
+          - ubuntu-20.04-python2
           - ubuntu-22.04
       fail-fast: false
     steps:

ubuntu-20.04-python2/Dockerfile

@@ -0,0 +1,11 @@
+FROM ubuntu:20.04
+RUN useradd -ms /bin/bash easybuild
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt update \
+&& apt install -y curl python2 python-pip-whl \
+&& LMOD_VERSION=8.6.12 \
+&& curl -OL https://github.com/surak/Lmod/releases/download/${LMOD_VERSION}/lmod_${LMOD_VERSION}_all.deb \
+&& apt install -y ./lmod_${LMOD_VERSION}_all.deb
+# debianutils provides 'which' command
+RUN apt install -y bzip2 debianutils diffutils file gcc g++ git gzip libibverbs-dev openssl libssl-dev make patch sudo tar unzip xz-utils
+RUN python2 -m pip install archspec==0.1.4