Add GitHub actions workflow configuration (vesoft-inc#945)

* Add action workflow file

* Fix syntax error

* Fix syntax error

* Fix github actions workflow ci syntax error

* Fix tty error

* Add pull request event trigger

* Use container to simplify build job

* Need not the environment bash

* Number of threads limit

* Fix on events of actions

* Switch shell to bash

* Enable devtoolset environment variables

* Add cmake task

* Make ctest output on failure

.dockerignore

@@ -1,3 +1,4 @@
 *.md
 
+docs/
 _build/

.github/workflows/ci.yaml

@@ -0,0 +1,30 @@
+name: Nebula Build and Test Workflow
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    name: build
+    runs-on: ubuntu-18.04
+    container:
+      image: vesoft/nebula-dev:centos
+    steps:
+      - uses: actions/checkout@v1
+        with:
+          fetch-depth: 1
+      - name: cmake
+        run: |
+          . /etc/profile.d/devtoolset-8-enable.sh
+          mkdir _build
+          cd _build && cmake ..
+        shell: bash
+      - name: make
+        run: |
+          . /etc/profile.d/devtoolset-8-enable.sh
+          cd _build && make -j2
+        shell: bash
+      - name: test
+        run: |
+          . /etc/profile.d/devtoolset-8-enable.sh
+          cd _build && ctest --output-on-failure
+        shell: bash