Add Code coverage github badge

.github/workflows/test-coverage.yaml

@@ -0,0 +1,27 @@
+name: Code Test Coverage
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    name: Test with Coverage
+    runs-on: ubuntu-latest
+    steps:
+    - name: Set up Go
+      uses: actions/setup-go@v2
+      with:
+        go-version: '1.16'
+    - name: Check out code
+      uses: actions/checkout@v2
+    - name: Install dependencies
+      run: |
+        go mod download
+    - name: Run Unit tests
+      run: |
+        go test -race -covermode atomic -coverprofile=covprofile ./...
+    - name: Install goveralls
+      run: go install github.com/mattn/goveralls@latest
+    - name: Send coverage
+      env:
+        COVERALLS_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      run: goveralls -coverprofile=covprofile -service=github