feat: Adds ubuntu tests to ci

.github/workflows/ci.yaml

@@ -20,3 +20,13 @@ jobs:
         run: sudo xcode-select -s /Applications/Xcode_${{ matrix.xcode }}.app
       - name: Run ${{ matrix.xcode }} Tests for ${{ matrix.config }}
         run: swift test
+
+  ubuntu:
+    name: ubuntu
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Build docker test image.
+        run: docker build -t 'hvac-toolbox:test' -f Dockerfile.dev .
+      - name: Run tests
+        run: docker run -i 'hvac-toolbox:test' swift test