ci: add workflow for automatic deployment

.gitea/workflows/deploy.yml

@@ -0,0 +1,31 @@
+name: Deploy Prefect Flows
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - 'flows/**'
+      - 'deploy.py'
+  workflow_dispatch:
+
+jobs:
+  deploy:
+    runs-on: docker
+    container:
+      image: python:3.12-slim
+    steps:
+      - name: Install dependencies
+        run: |
+          apt-get update && apt-get install -y git
+          pip install --no-cache-dir prefect prefect-aws
+
+      - name: Checkout repository
+        run: |
+          git clone --depth 1 https://gitea.arnodo.fr/${{ gitea.repository }}.git .
+          git checkout ${{ gitea.sha }}
+
+      - name: Deploy flows to Prefect
+        env:
+          PREFECT_API_URL: ${{ secrets.PREFECT_API_URL }}
+        run: |
+          python deploy.py