feat: Add code coverage artifacts for che operator

Signed-off-by: Flavius Lacatusu <flacatus@redhat.com>

.github/workflows/codecov.yml

@@ -0,0 +1,29 @@
+#
+# Copyright (c) 2012-2021 Red Hat, Inc.
+# This program and the accompanying materials are made
+# available under the terms of the Eclipse Public License 2.0
+# which is available at https://www.eclipse.org/legal/epl-2.0/
+#
+# SPDX-License-Identifier: EPL-2.0
+#
+# Contributors:
+#   Red Hat, Inc. - initial API and implementation
+
+name: che-operator
+on: [push]
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-20.04
+    name: Code Coverage Report
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2.3.1
+        with:
+          persist-credentials: false
+      - name: Submit code coverage results
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+        run: |
+         echo "" > coverage.txt
+         export MOCK_API=true && go test -mod=vendor -v ./... -coverprofile coverage.txt
+         bash <(curl -s https://codecov.io/bash)

README.md

@@ -1,5 +1,7 @@
 # Che/CodeReady Workspaces Operator
 
+[![Codecov](https://img.shields.io/codecov/c/github/eclipse/che-operator)](https://github.com/eclipse/che-operator)
+
 Che/CodeReady workspaces operator uses [Operator SDK](https://github.com/operator-framework/operator-sdk) and [Go Kube client](https://github.com/kubernetes/client-go) to deploy, update and manage K8S/OpenShift resources that constitute a single or multi-user Eclipse Che/CodeReady Workspaces cluster.
 
 The operator watches for a Custom Resource of Kind `CheCluster`, and operator controller executes its business logic when a new Che object is created, namely: