feat test testU backend

.github/workflows/run_back_test.yml

@@ -1,11 +1,17 @@
-name: Jest test unit
-on: push
+name: 'coverage'
+on:
+  pull_request:
+    branches:
+      - master
 jobs:
-  build:
+  coverage:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
-    - name: Install modules
-      run: npm ci
-    - name: Run tests
-      run: npm run test
+      - uses: actions/checkout@v3
+      - uses: ArtiomTr/jest-coverage-report-action@v2
+        with:
+          working-directory: Express/barAndCafe
+          test-script: npm run test
+          output: comment, report-markdown
+          prnumber: ${{ steps.findPr.outputs.number }}
+          custom-title: Coverage report for backend