Switch back to pure docker builds to keep docker compose files clean

.github/workflows/run-unit-tests.yaml

@@ -8,14 +8,38 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - name: Checkout repository
+      - name: Check out the repository
         uses: actions/checkout@v4
 
-      - name: Build Docker image for library unit tests
+      - name: Read version from file
         run: |
-          docker compose run --rm --build arbitration_graphs_test
+          cat version >> $GITHUB_ENV
 
-      - name: Build Docker image for demo unit tests
+      - name: Build core library unit test Docker image
+        uses: docker/build-push-action@v6
+        with:
+          push: false
+          tags: |
+            ghcr.io/kit-mrt/arbitration_graphs_tests:${{ env.VERSION }}
+          target: unit_test
+
+      - name: Run library unit tests
         run: |
-          docker compose -f demo/docker-compose.yaml run --rm --build demo_test
+          docker run --rm ghcr.io/kit-mrt/arbitration_graphs_test:${{ env.VERSION }}
+
+      - name: Build Pacman demo unit test Docker image
+        uses: docker/build-push-action@v6
+        with:
+          build-args: |
+            VERSION=${{ env.VERSION }}
+          context: demo
+          file: demo/Dockerfile
+          push: false
+          tags: |
+            ghcr.io/kit-mrt/arbitration_graphs_pacman_demo_tests:latest
+            ghcr.io/kit-mrt/arbitration_graphs_pacman_demo_tests:${{ env.VERSION }}
+          target: unit_test
 
+      - name: Run demo unit tests
+        run: |
+          docker run --rm ghcr.io/kit-mrt/arbitration_graphs_pacman_demo_tests:${{ env.VERSION }}

demo/docker-compose.yaml

@@ -1,13 +1,4 @@
 services:
-  demo_test:
-    image: ghcr.io/kit-mrt/arbitration_graphs_pacman_demo_test:$VERSION
-    build:
-      context: .
-      args:
-        - VERSION=$VERSION
-      target: unit_test
-    env_file: .env
-
   tutorial:
     image: ghcr.io/kit-mrt/arbitration_graphs_pacman_tutorial:$VERSION
     build:

docker-compose.yaml

@@ -14,11 +14,3 @@ services:
     volumes:
       - .:/home/blinky/arbitration_graphs
 
-  arbitration_graphs_test:
-    build:
-      context: .
-      target: unit_test
-    extends:
-      service: arbitration_graphs
-    image: arbitration_graphs_test:$VERSION
-