Create ci.yml

.github/workflows/ci.yml

@@ -0,0 +1,17 @@
+name: CI
+on: [push]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - uses: actions/setup-node@v1
+      with:
+        node-version: 12
+    - run: |
+        yarn install
+        yarn build
+        yarn lint
+        yarn test
+      env:
+        CI: true