refactor: use docker build action

Author: mariuswinger

.github/workflows/tests.yaml

@@ -39,15 +39,26 @@ jobs:
   api-integration-tests:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - name: "Setup: checkout repository"
+        uses: actions/checkout@v4
 
-      - name: "Login to GitHub Container Registry"
+      - name: "Setup: Login to GitHub Container Registry"
         uses: docker/login-action@v3
         with:
           registry: ${{ env.IMAGE_REGISTRY }}
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
+      - name: "Setup: Docker Buildx"
+        uses: docker/setup-buildx-action@v3
+
+      - name: "Setup: Build API image"
+        uses: docker/build-push-action@v6
+        with:
+          context: ./api
+          target: development
+          tags: ${{ env.API_IMAGE }}
+
       - name: Build API image
         run: |
           docker pull $API_IMAGE