Add FTP deployment workflow for main branch

This workflow deploys code to a web server via FTP when changes are pushed to the main branch.

Author: shvyac

.github/workflows/deploy.yml

@@ -0,0 +1,27 @@
+name: Deploy to Web Server via FTP
+ 
+on:
+  push:
+    branches:
+      - main  # mainブランチにpushされたときに実行
+ 
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+ 
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v3
+ 
+    - name: Deploy to FTP server
+      uses: SamKirkland/FTP-Deploy-Action@v4.3.4
+      with:
+        server: ${{ secrets.FTP_SERVER }}
+        username: ${{ secrets.FTP_USERNAME }}
+        password: ${{ secrets.FTP_PASSWORD }}
+        server-dir: /radio/QSL_card_designer/  # デプロイ先のディレクトリ（必要に応じて変更）
+        exclude: |
+          **/.git*
+          **/.git*/**
+          **/node_modules/**
+          .github/**