Update gitlab CI to use python image and poetry

.gitlab-ci.yml

@@ -11,25 +11,16 @@ stages:
     - date
     - pwd
     - ls
-    - apt list --installed
-    - apt-get update
-    - apt-get install -q -y git
-    - git --version
-    - apt-get install -q -y python3-setuptools
-    - python3 setup.py --requires
-    - apt-get install -q -y python3-appdirs
-    #- python3 setup.py check_modules
-    - apt-get install -q -y python3-pip
-    - python3 -V
-    - pip3 -V
-    - git clone https://$clone_token@gitlab.hzdr.de/hmc/hmc/cct-1-mapping/category-definitions.git
-    - pip3 install ./category-definitions
-    - pip3 install .[pre-commit,testing]
-
+    - python -V
+    - pip -V
+    #- git clone https://$clone_token@gitlab.hzdr.de/hmc/hmc/cct-1-mapping/category-definitions.git
+    #- pip install ./category-definitions
+    - pip install poetry
+    - poetry install --with dev
 
 # precommit specific stuff
 run_precommit:
-  image: ubuntu:20.04
+  image: python:latest
   stage: test
   <<: *prepare-env
   script:
@@ -37,6 +28,7 @@ run_precommit:
 
 # test specific stuff
 .tests-template: &run-tests
+image: python:latest
   stage: test
   <<: *prepare-env
   script: