add github action for running tests

#19

.github/workflows/main.yml

@@ -0,0 +1,44 @@
+name: Build
+
+on: push
+
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [18.x]
+        # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
+    steps:
+    - uses: actions/checkout@v3
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v3
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: echo Using node version $(node --version)
+    - run: echo Using npm version $(npm --version)
+    - run: cp .sample.env .env
+
+    - name: Cache node modules
+      id: cache-npm
+      uses: actions/cache@v3
+      env:
+        cache-name: cache-node-modules
+      with:
+        # npm cache files are stored in `~/.npm` on Linux/macOS
+        path: ~/.npm
+        key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
+        restore-keys: |
+          ${{ runner.os }}-build-${{ env.cache-name }}-
+          ${{ runner.os }}-build-
+          ${{ runner.os }}-
+
+    - if: ${{ steps.cache-npm.outputs.cache-hit != 'true' }}
+      name: List the state of node modules
+      continue-on-error: true
+      run: npm list
+
+    - run: npm install
+    - run: npm run test
+