Draft: ci: add .gitlab-ci.yml containing CI pipeline with DCO and ECA check

The first version of the ci pipeline consists simply of DCO and ECA check.

Signed-off-by: Francesco Pham francesco.pham@huawei.com

.gitlab-ci.yml

+# SPDX-License-Identifier: Apache-2.0
+#
+# Copyright 2020-2021 Huawei Inc.
+#
+# 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.
+
+stages:
+  - compliance
+
+include:
+  - project: 'eclipse/oniro-core/oniro'
+    file: '.oniro-ci/dco.yaml'
+  - template: 'Workflows/MergeRequest-Pipelines.gitlab-ci.yml'
+  - project: 'eclipsefdn/it/releng/gitlab-ci-templates'
+    file: '/jobs/eca.gitlab-ci.yml'
+
+dco:
+  extends: .dco
+
+eca:
+  extends: .eca