Include PostgreSQL in the testing matrix

.github/matrix.json

@@ -1,4 +1,5 @@
 {
+  "postgresql": ["12"],
   "ruby": ["2.7"],
   "node": ["14"]
 }

.github/workflows/foreman.yml

@@ -21,21 +21,19 @@ jobs:
         id: build_matrix
         uses: theforeman/gha-matrix-builder@v0
   test:
-    name: "Ruby ${{ matrix.ruby }} and Node ${{ matrix.node }}"
+    name: "Ruby ${{ matrix.ruby }} and Node ${{ matrix.node }} on PostgreSQL ${{ matrix.postgresql }}"
     runs-on: ubuntu-latest
     needs: setup_matrix
     services:
       postgres:
-        image: 'postgres:12'
+        image: 'postgres:${{ matrix.postgresql }}'
         ports: ['5432:5432']
         options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
         env:
           POSTGRES_PASSWORD: password
     strategy:
       fail-fast: false
-      matrix:
-        ruby: ${{ fromJson(needs.setup_matrix.outputs.matrix).ruby }}
-        node: ${{ fromJson(needs.setup_matrix.outputs.matrix).node }}
+      matrix: ${{ fromJson(needs.setup_matrix.outputs.matrix) }}
     steps:
       - run: sudo apt-get update
       - run: sudo apt-get -qq -y install build-essential libcurl4-openssl-dev zlib1g-dev libpq-dev libvirt-dev
@@ -49,10 +47,10 @@ jobs:
       - name: Archive Gemfile.lock
         uses: actions/upload-artifact@v3
         with:
-          name: Gemfile.lock
+          name: Gemfile-ruby-${{ matrix.ruby }}-node-${{ matrix.node }}-pg-${{ matrix.postgresql }}.lock
           path: Gemfile.lock
       - name: "Set up Node ${{ matrix.node }}"
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node }}
       - name: Prepare test env