chore: Add GitHub Actions workflow for production deployment

Author: NEZuko1337

.github/workflows/deploy.yml

@@ -0,0 +1,27 @@
+name: Deploy to Production
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  deploy:
+    name: Build & Deploy on server
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Deploy via SSH
+        uses: appleboy/ssh-action@v1.2.0
+        with:
+          host: ${{ secrets.SSH_HOST }}
+          username: ${{ secrets.SSH_USER }}
+          key: ${{ secrets.SSH_PRIVATE_KEY }}
+          script: |
+            set -e
+            cd /opt/assistant-chat-backend
+            git pull origin main
+            docker compose build --no-cache
+            docker compose down --remove-orphans
+            docker compose up -d
+            docker image prune -af