build: test를 위한 github action 추가

Author: jeongnaehyeok

.github/workflows/test.yml

@@ -0,0 +1,22 @@
+name: Tests
+
+on: [push]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [16.x]
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: npm
+      - name: install
+        run: npm install
+
+      - uses: mattallty/jest-github-action@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.ACTION_TOKEN }}