ensure gunicorn restart when backend updates pushed

.github/workflows/deploy_backend.yml

@@ -0,0 +1,23 @@
+name: Deploy to EC2
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - app/**  
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Deploy to EC2
+      uses: appleboy/ssh-action@v0.1.7
+      with:
+        host: ${{ secrets.EC2_HOST }}
+        username: ubuntu
+        key: ${{ secrets.EC2_SSH_KEY }}
+        script: |
+          cd ~/yt_translator
+          app/post_update.sh

app/post_update.sh

@@ -1,12 +1,20 @@
 #!/bin/bash
 
+cd ~/yt_translator
+git pull origin main
+
 # Copy custom settings file
-if [ ! -f settings.py ]; then
+if [ ! -f video_host/settings.py ]; then
     echo "Restoring settings.py..."
     cp /home/ubuntu/settings_backup/settings.py video_host/settings.py
 fi
 
 source /home/ubuntu/yt_translator/venv/bin/activate
 python manage.py migrate
 
+sudo systemctl stop gunicorn
+sudo systemctl daemon-reload
+sudo systemctl start gunicorn
+sudo systemctl enable gunicorn
+