feat: Adding deploy to vps GitHub workflow

This workflow uses rsync to copy public folder to VPS server.

.github/workflows/deploy-to-vps.yaml

@@ -0,0 +1,67 @@
+name: Deploy to VPS
+
+on:
+  # auto deploy when pushing to specified branches.
+  push:
+    branches:
+      - main
+
+  # allow triggering workflow manually.
+  workflow_dispatch:
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      deployments: write
+    name: Build and copy to VPS
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Setup Node
+        uses: actions/setup-node@v3
+        with:
+          node-version: "19"
+
+      - name: Cache dependencies
+        uses: actions/cache@v3
+        with:
+          path: ~/.npm
+          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node-
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Setup Hugo
+        uses: peaceiris/actions-hugo@v2
+        with:
+          hugo-version: "latest"
+          extended: true
+
+      - name: Cache Hugo modules
+        uses: actions/cache@v3
+        with:
+          path: /tmp/hugo_cache
+          key: ${{ runner.os }}-hugomod-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-hugomod-
+
+      - name: Build
+        run: hugo --minify --gc --enableGitInfo --cleanDestinationDir
+        # Use following instead if defaultContentLanguageInSubdir is enabled.
+        # run: hugo --minify --gc --enableGitInfo --cleanDestinationDir && cp public/en/404.html public/404.html
+
+      - name: Deploy website with rsync
+        uses: burnett01/rsync-deployments@5.2
+        with:
+          switches: -avzr --quiet --delete
+          path: public/
+          remote_path: ${{ secrets.DEPLOY_PATH }}
+          remote_host: ${{ secrets.DEPLOY_HOST }}
+          remote_user: ${{ secrets.DEPLOY_USER }}
+          remote_key: ${{ secrets.DEPLOY_KEY }}