chg: pkg: implement CD script to Gitea and add docs to the process #4

.gitea/workflows/deploy.yml

@@ -0,0 +1,19 @@
+name: Deploy to Production
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  deploy:
+    runs-on: self-hosted
+    steps:
+      - name: Deploy
+        run: |
+          set -e
+          cd "${{ vars.PROD_APP_DIR }}"
+          git fetch --tags
+          git checkout "${{ gitea.ref_name }}"
+          printf '%s' '${{ secrets.PROD_ENV_FILE }}' > .env
+          docker compose up -d --build