Infrastructure: Add testing via GitHub Actions

Author: TheBizzle

.github/workflows/main.yml

@@ -0,0 +1,34 @@
+name: ColorPicker
+
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2
+
+      - name: Set up Node
+        uses: actions/setup-node@v3
+        with:
+          node-version: '14'
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Build
+        run: npm build
+
+      - name: Lint
+        run: npm lint
+
+      - name: Stage
+        run: stage.sh
+
+      - name: Run Jest tests
+        run: npm test