Remove Ubuntu focal from testing and Docker support (#51)

* Remove Ubuntu 20.04 from testing and Docker support

* Add Changelog entry

Author: IshaanDesai

.github/workflows/build_and_test.yaml

@@ -27,7 +27,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        UBUNTU_VERSION: [noble, jammy, focal]
+        UBUNTU_VERSION: [noble, jammy]
     steps:
       - name: Checkout code
         uses: actions/checkout@v4

.github/workflows/docker.yaml

@@ -6,7 +6,7 @@ jobs:
   build-and-push:
     strategy:
       matrix:
-        ubuntu-version: [noble, jammy, focal]
+        ubuntu-version: [noble, jammy]
 
     runs-on: ubuntu-latest
 

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## latest
 
+- Remove Ubuntu 20.04 from testing and Docker support https://github.com/DataAnalyticsEngineering/FANS/pull/51
 - Add support for `--version` command line argument for checking the version of FANS
 - Modify way to provide micro structure in JSON input https://github.com/DataAnalyticsEngineering/FANS/pull/43
 - Add conda package for FANS https://github.com/DataAnalyticsEngineering/FANS/pull/39

docker/README.md

@@ -5,7 +5,7 @@ We provide a set of docker images for different use cases on our [Dockerhub prof
 - **fans-ci**: Contains the minimum tools to build FANS (including dev packages of dependencies with the required headers), but does not include FANS itself. Meant for a CI workflow.
 - **fans-dev**: Based upon fans-ci, but offers a non-root user (`fans`) and handling of UID and GID to not mess up permissions when volume mounting into the container. Meant as an quick to setup build environment for FANS.
 
-Both images are built for linux/amd64 and linux/arm64 as well as for the three most recent Ubuntu LTS versions (focal, jammy, noble). The Ubuntu version can be selected through tags, e.g. `fans-dev:focal`; `noble` is equivalent to the `latest` tag. The architecture is selected automatically depending on your host platform.
+Both images are built for linux/amd64 and linux/arm64 as well as for the three most recent Ubuntu LTS versions (jammy and noble). The Ubuntu version can be selected through tags, e.g. `fans-dev:jammy`; `noble` is equivalent to the `latest` tag. The architecture is selected automatically depending on your host platform.
 
 ## Set up a Container