chore(deploy): set up ci/cd pipelines

.github/workflows/deploy.yml

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+name: CD pipeline to auto-deploy on merges to main
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  auto-deploy:
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+
+    steps:
+      - name: deploy app
+        uses: appleboy/ssh-action@master
+        with:
+          host: ${{ secrets.HOST }}
+          username: ${{ secrets.USERNAME }}
+          key: ${{ secrets.KEY }}
+          script: |
+            cd commit-quality-monitor
+            git pull origin main
+            source ./venv/bin/activate
+            pip install -r requirements.txt
+            sudo systemctl restart fastapi
+            sudo systemctl restart nginx

.github/workflows/pytest.yml

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+name: CI pipeline to run pytest on pull requests
+
+on:
+  pull_request:
+    branches:
+      - staging
+
+jobs:
+  pytest:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository for workflow access
+        uses: actions/checkout@v4
+
+      - name: set up python environment
+        uses: actions/setup-python@v3
+        with:
+          python-version: '3.8'
+
+      - name: install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+
+      - name: run tests
+        run: |
+          pytest