Add training workflow

.github/workflows/trainer.yml

@@ -0,0 +1,38 @@
+name: Run training logic
+on:
+  schedule:
+    - cron: '13 10 * * *'
+  push:
+    branches:
+      - main
+permissions:
+  contents: write
+jobs:
+  trainer:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python 3.9
+        uses: actions/setup-python@v2
+        with: { python-version: '3.9' }
+      - name: Install cbng-trainer
+        run: pip install git+https://github.com/cluebotng/trainer.git@main
+      - name: Download reviewed edits
+        run: cbng-trainer download-edits --output=edits.xml
+      - name: Build databases
+        run: |
+          mkdir -p new
+          cbng-trainer build-database --input=edits.xml --output new/
+      - name: Prepare files
+        id: prep
+        run: |
+          sudo chown -R runner:docker new
+          sudo chmod 644 new/*
+          cp edits.xml new/ || true
+          echo "::set-output name=date::$(date +'%Y-%m-%d')"
+      - name: Crease a release
+        uses: ncipollo/release-action@v1
+        with:
+          token: "${{ secrets.GITHUB_TOKEN }}"
+          artifacts: "new/*"
+          tag: "${{ steps.prep.outputs.date }}"