Split action into multiple jobs

.github/workflows/integration-test.yml

@@ -11,10 +11,7 @@ env:
   TEST_TAG: donkie/spoolman:test
 
 jobs:
-  tests:
+  build:
-    strategy:
-      matrix:
-        dbtype: ["postgres"]
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
@@ -27,12 +24,28 @@ jobs:
           context: .
           load: true
           tags: donkie/spoolman:test
+  build-tester:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
       - name: Build Spoolman Tester
         uses: docker/build-push-action@v4
         with:
           context: ./tests_integration
           load: true
           tags: donkie/spoolman-tester:latest
+  tests:
+    needs: [build, build-tester]
+    strategy:
+      matrix:
+        dbtype: ["postgres"]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
       - uses: isbang/compose-action@v1.4.1
         with:
           compose-file: "./tests_integration/docker-compose-${{ matrix.dbtype }}.yml"