WIP: Add unit test code coverage

.github/workflows/lint-and-tests.yml

@@ -4,6 +4,7 @@ on:
   push:
     branches: [ "main" ]
     paths:
+      - '.github/workflows/**'
       - 'pkg/**'
       - 'cmd/**'
       - 'api/**'
@@ -13,6 +14,7 @@ on:
   pull_request:
     branches: [ "main" ]
     paths:
+      - '.github/workflows/**'
       - 'pkg/**'
       - 'cmd/**'
       - 'api/**'
@@ -64,4 +66,24 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-go-
       - name: Run Unit Tests
-        run: make test
+        run: make test
+      - name: Archive code coverage results
+        uses: actions/upload-artifact@v4
+        with:
+          name: code-coverage
+          path: cover.out # Make sure to use the same file name you chose for the "-coverprofile" in the "Test" step
+
+  code_coverage:
+    name: "Code coverage report"
+    if: github.event_name == 'pull_request' # Do not run when workflow is triggered by push to main branch
+    runs-on: ubuntu-latest
+    needs: test # Depends on the artifact uploaded by the "unit_tests" job
+    permissions:
+      contents:      read
+      actions:       read  # to download code coverage results from "test" job
+      pull-requests: write # write permission needed to comment on PR
+    steps:
+      - uses: fgrosse/[email protected] # Consider using a Git revision for maximum security
+        with:
+          coverage-artifact-name: "code-coverage" # can be omitted if you used this default value
+          coverage-file-name: "cover.out" # can be omitted if you used this default value