feat(deploy): add GitHub Actions workflow for deployment to server

.gitea/workflows/deploy.yml

@@ -0,0 +1,30 @@
+name: Deploy
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build
+        run: npm run build
+
+      - name: Deploy to /var/www
+        run: |
+          rm -rf /var/www/os.m1ngdaxie.com/*
+          cp -r dist/* /var/www/os.m1ngdaxie.com/