Add initial GitHub actions setup (#2)

* Add initial GitHub actions setup

* Remove Travis CI script and remove format script in GitHub Actions CI

Author: dualcnhq

.github/workflows/ci.yml

@@ -0,0 +1,23 @@
+name: App CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-node@v1
+      with:
+        node-version: 15.x
+
+    - name: Install dependencies 
+      run: yarn install
+
+    - name: Run tests
+      run: yarn run test