Deploy to staging after merge to master

.github/workflows/deploy-staging.yaml

@@ -0,0 +1,42 @@
+name: Deploy to staging
+on:
+  push:
+    branches:
+      - master
+jobs:
+  build:
+    runs-on: ubuntu-20.04
+    env:
+      API_URI: https://master.staging.saleor.cloud/graphql
+      APP_MOUNT_URI: /dashboard/
+      STATIC_URL: /dashboard/static/
+    steps:
+      - uses: actions/checkout@v2
+      - name: Package
+        run: |
+          npm ci
+          npm run build
+      - uses: actions/upload-artifact@v2
+        with:
+          name: build
+          path: build
+  deploy:
+    needs:
+      - build
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/download-artifact@v2
+        with:
+          name: build
+          path: build
+      - name: Configure AWS Credentials
+        uses: aws-actions/configure-aws-credentials@v1
+        with:
+          aws-access-key-id: ${{ secrets.AWS_STAGING_ACCESS_KEY_ID }}
+          aws-secret-access-key: ${{ secrets.AWS_STAGING_SECRET_ACCESS_KEY }}
+          aws-region: us-east-1
+      - name: Deploy
+        run: |
+          aws s3 sync build/dashboard s3://${{ secrets.AWS_STAGING_DEPLOYMENT_BUCKET }}/saleor-master-staging/static/
+          aws s3 cp build/dashboard/index.html s3://${{ secrets.AWS_STAGING_DEPLOYMENT_BUCKET }}/saleor-master-staging/
+          aws cloudfront create-invalidation --distribution-id ${{ secrets.AWS_STAGING_CF_DIST_ID }} --paths "/dashboard*"