feat: add pr workflow

.github/workflows/pull_request.yaml

@@ -0,0 +1,38 @@
+name: Run tests on Branch
+
+on:
+  workflow_dispatch:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  run-unit-tests:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install dependencies
+        run: npm ci
+      - name: Run unit tests
+        run: npm test
+
+  deploy-ephemeral:
+    uses: ./.github/workflows/serverless-deploy.yaml
+    needs: run-unit-tests
+    permissions:
+      id-token: write
+      contents: read
+    secrets:
+      AWS_DEPLOYER_ROLE: ${{ secrets.AWS_DEPLOYER_ROLE }}
+    with:
+      ENVIRONMENT: ${{ github.actor }}-${{ github.event.pull_request.number }}
+      SHOULD_SEED_DB: true
+
+  run-functional-tests:
+    needs: deploy-ephemeral
+    runs-on: ubuntu-latest
+    steps:
+      - name: Run functional tests
+        run: echo "Running functional tests against ${{ needs.deploy-ephemeral.outputs.SERVICE_URL }}"
+        env:
+          SERVICE_URL: ${{ needs.deploy-ephemeral.outputs.SERVICE_URL }}