fix deploy: add apk SSH install, use docker gateway IP

.gitea/workflows/deploy.yml

@@ -1,4 +1,4 @@
-name: Deploy Frontend
+name: Deploy Backend
 on:
   push:
     branches: [main]
@@ -8,6 +8,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+      - name: Install SSH client
+        run: apk add --no-cache openssh-client
       - name: Setup SSH key
         env:
           SSH_KEY: ${{ secrets.DEPLOY_KEY }}
@@ -15,6 +17,6 @@ jobs:
           mkdir -p ~/.ssh
           echo "$SSH_KEY" > ~/.ssh/id_ed25519
           chmod 600 ~/.ssh/id_ed25519
-          ssh-keyscan -p 2234 -H 172.17.0.1 >> ~/.ssh/known_hosts
+          ssh-keyscan -p 2234 -H 87.248.133.138 >> ~/.ssh/known_hosts
       - name: Deploy
-        run: ssh -p 2234 devops@172.17.0.1 'bash /opt/services/parsa/frontend/deploy.sh'
+        run: ssh -p 2234 devops@87.248.133.138 'bash /opt/services/parsa/backend/deploy.sh'