Add code coverage GH action

.github/workflows/build.yml

@@ -38,6 +38,20 @@ jobs:
           filters: |
             golang:
               - '**.go'
+  code-coverage:
+    name: Check code coverage
+    if: needs.changes.outputs.golang == 'true'
+    needs: changes
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      issues: write
+      pull-requests: write
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # 4.2.2
+      - uses: gwatts/go-coverage-action@2845595538a59d63d1bf55f109c14e104c6f7cb3 # 2.0.0
+        with:
+          coverage-threshold: 40
   unit-test:
     name: Check Go lang unit tests
     if: needs.changes.outputs.golang == 'true'
@@ -77,7 +91,7 @@ jobs:
       contents: read
       attestations: write
       id-token: write
-    needs: unit-test
+    needs: [code-coverage, unit-test]
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # 4.2.2
       - name: Log in to the Container registry