feat(build): support for multi arch container image (#233)

* support for multi arch container image via github actions
* suffix amd64 arch tag in zfs driver image

Signed-off-by: prateekpandey14 <prateek.pandey@mayadata.io>

.github/workflows/pull_request.yml

@@ -0,0 +1,75 @@
+# Copyright 2020 The OpenEBS Authors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: ci
+
+on:
+  pull_request:
+    branches:
+      # on pull requests to master and release branches
+      - master
+      - 'v*'
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Shellcheck
+        uses: reviewdog/action-shellcheck@v1
+        with:
+          github_token: ${{ secrets.github_token }}
+          reporter: github-pr-review
+          path: '.'
+          pattern: '*.sh'
+          exclude: './vendor/*'
+
+
+  unit-test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Unit test
+        run: make test
+
+      - name: Upload Coverage Report
+        uses: codecov/codecov-action@v1
+
+
+  csi-driver:
+    runs-on: ubuntu-latest
+    needs: ['lint', 'unit-test']
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+        with:
+          platforms: all
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v1
+        with:
+          version: latest
+
+      - name: Build Image
+        env:
+          IMG_RESULT: cache
+        run: make docker.buildx.csi-driver