Introduced nightly builds workflow

.github/workflows/nightly-builds.yml

@@ -0,0 +1,43 @@
+name: Nightly builds
+on:
+  schedule:
+    - cron: '0 0 * * *' # Run at 12 AM UTC.
+jobs:
+  build:
+    name: Nightly builds
+    strategy:
+      fail-fast: false
+      matrix:
+        build: [master]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+        with:
+          ref: ${{ matrix.build }}
+      - name: Build
+        id: build
+        uses: woocommerce/woocommerce-build-action@master
+        with:
+          generate-zip: true
+      - name: Deploy nightly build
+        uses: WebFreak001/deploy-nightly@v1.0.3
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: https://uploads.github.com/repos/${{ github.repository }}/releases/25945111/assets{?name,label}
+          release_id: 25945111
+          asset_path: ${{ steps.build.outputs.zip_path }}
+          asset_name: ${{ github.event.repository.name }}-${{ matrix.build }}-nightly.zip
+          asset_content_type: application/zip
+          max_releases: 1
+  update:
+    name: Update nightly tag commit ref
+    runs-on: ubuntu-latest
+    steps:
+      - name: Update nightly tag
+        uses: richardsimko/github-tag-action@1.0.0
+        with:
+          tag_name: nightly
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}