initial commit

.github/workflows/daily.yml

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+name: Daily snapshot
+
+on:
+  schedule:
+  - cron: '0 4 * * *'   # run every day at 4 AM
+  workflow_dispatch:
+
+jobs:
+  snapshot:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-node@v2
+      with:
+        node-version: 16
+    - run: yarn install
+    - run: yarn run daily