feat: add github workflow (#1)

.github/workflows/main.yaml

@@ -0,0 +1,34 @@
+name: Build/Lint
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Cache Node.js dependencies
+        uses: actions/cache@v2
+        with:
+          path: node_modules
+          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node-
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Run linting
+        run: npm run lint
+
+      - name: Build
+        run: npm run build