Use OBS built container as CI base to provide all dependencies

.circleci/config.yml

@@ -3,30 +3,20 @@ version: 2.1
 jobs:
   unit:
     docker:
-      - image: registry.opensuse.org/opensuse/leap:15.5
+      - image: registry.opensuse.org/devel/openqa/openqa-trigger-from-obs/containers/openqa-trigger-from-obs-dev
     steps:
       - checkout
-      - run:
-          command: |
-            zypper -n in --no-recommends diffutils make python3 tar git-core
-      - checkout
-      - run: git clean -df
       - run: make test_regen_all
       - run: make test
 
   style:
     docker:
-      - image: registry.opensuse.org/opensuse/tumbleweed
+      - image: registry.opensuse.org/devel/openqa/openqa-trigger-from-obs/containers/openqa-trigger-from-obs-dev
     steps:
       - checkout
-      - run:
-          command: |
-            zypper -n in --no-recommends make python3-black python3-importlib-metadata
-      - checkout
       - run: make test_python_style
 
 workflows:
-  version: 2.1
   test:
     jobs:
       - unit

container/Dockerfile

@@ -0,0 +1,4 @@
+#!BuildTag: openqa-trigger-from-obs-dev
+#!UseOBSRepositories
+FROM opensuse/tumbleweed
+RUN zypper -n in --no-recommends diffutils tar make git-core python3-black