Fix frontend CI workflow

- Uses only version 14 for testing main flow
- Updates checkout and setup-node
- Removes cache for node-next versions

.github/workflows/frontend.yml

@@ -30,19 +30,16 @@ jobs:
               - 'frontend/**'
               - '.github/workflows/**'
 
-  npm-test:
-    strategy:
-      matrix:
-        node_version: ['12.22.6', '14.21']
+  test-app:
     needs: changes
     if: ${{ needs.changes.outputs.frontend == 'true' }}
     runs-on: ubuntu-latest
     timeout-minutes: 7
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-node@v2
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v3
         with:
-          node-version: ${{ matrix.node_version }}
+          node-version: 14
           cache: npm
           cache-dependency-path: frontend/package-lock.json
       - run: npm install -g npm@7.0.0
@@ -60,21 +57,12 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 7
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-node@v2
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v3
         with:
           node-version: ${{ matrix.node_version }}
-          cache: npm
-          cache-dependency-path: frontend/package-lock.json
       - run: npm install -g npm@7.0.0
       - run: npm install
         working-directory: ./frontend
       - run: npm run test
         working-directory: ./frontend
-
-  test-app:
-    name: Test app
-    needs: [ npm-test ]
-    runs-on: ubuntu-latest
-    steps:
-      - run: echo "done"