Rename and update deployment workflow

- Renames the workflow from `CI` to `Deploy to Server`.
- Adds SSH key setup and deployment steps.
- Uses secrets for SSH key, host, user, and port.
- Pulls the latest changes from the origin master branch.
- Executes the build script after pulling changes.

.gitea/workflows/deploy.yml

@@ -1,4 +1,4 @@
-name: CI
+name: Deploy to Server
 
 on:
   push:
@@ -6,9 +6,28 @@ on:
       - master
 
 jobs:
-  say-hello:
+  deploy:
     runs-on: ubuntu-latest
+
     steps:
-      - uses: actions/checkout@v3
-      - name: Greet
-        run: echo "CI is working on Gitea!"
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Setup SSH
+        run: |
+          mkdir -p ~/.ssh
+          echo "$SSH_PRIVATE_KEY" | tr -d '\r' | ssh-add -
+          chmod 700 ~/.ssh
+          ssh-keyscan "$SSH_HOST" >> ~/.ssh/known_hosts
+          chmod 644 ~/.ssh/known_hosts
+        env:
+          SSH_PRIVATE_KEY: ${{ secrets.SSH_PRIVATE_KEY }}
+          SSH_HOST: ${{ secrets.SSH_HOST }}
+
+      - name: Deploy via SSH
+        run: |
+          ssh -p "$SSH_PORT" "$SSH_USER@$SSH_HOST" 'cd /home/rogsme/repo && git stash && git pull --force origin master && ./build.sh'
+        env:
+          SSH_USER: ${{ secrets.SSH_USER }}
+          SSH_HOST: ${{ secrets.SSH_HOST }}
+          SSH_PORT: ${{ secrets.SSH_PORT }}