Add GitHub Actions CI pipeline for unit tests and Docker image building.

.github/workflows/ci.yml

@@ -7,9 +7,8 @@ on:
     branches: [ "main" ]
 
 jobs:
-  build-and-test:
+  unit-tests:
     runs-on: ubuntu-latest
-
     steps:
     - name: Checkout code
       uses: actions/checkout@v3
@@ -26,7 +25,7 @@ jobs:
       uses: actions/setup-python@v4
       with:
         python-version: "3.10"
-        cache: 'pip' # Enable caching for pip
+        cache: 'pip'
 
     - name: Install dependencies
       run: |
@@ -38,14 +37,13 @@ jobs:
 
     - name: Lint with Ruff
       run: |
-        # Using make lint as defined in Makefile
         make lint
 
     - name: Run Unit Tests
       run: |
-        # Run tests and generate HTML report
         pytest tests/unit/ -v -m unit --html=report.html --self-contained-html
 
+    # Preserved contribution from Antonio Fratta
     - name: Upload Test Report
       if: failure()
       uses: actions/upload-artifact@v4
@@ -53,6 +51,21 @@ jobs:
         name: test-report
         path: report.html
 
+  build-image:
+    needs: unit-tests
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v3
+
+    - name: Free Disk Space
+      run: |
+        sudo rm -rf /usr/share/dotnet
+        sudo rm -rf /usr/local/lib/android
+        sudo rm -rf /opt/ghc
+        sudo rm -rf /opt/hostedtoolcache/CodeQL
+        sudo docker image prune --all --force
+
     - name: Configure DVC
       run: |
         dvc remote modify origin --local auth basic