update theme action

.github/workflows/theme-updater.yml

@@ -0,0 +1,51 @@
+name: "Theme Update"
+
+on:
+  schedule:
+    - cron: "0 0 * * 6" # weekly
+
+jobs:
+  update-theme:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4.1.1
+        with:
+          ref: main
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 18
+
+      - name: Setup Hugo
+        uses: peaceiris/actions-hugo@v3.0.0
+        with:
+          hugo-version: "latest"
+          extended: true
+
+      - name: Update hugo modules
+        run: |
+          # update to latest version of all modules
+          hugo mod get -u
+
+          # update the npm dependencies
+          hugo mod npm pack
+
+          # cleanup go.sum file
+          hugo mod tidy
+
+      - name: Install node modules
+        run: npm install
+
+      - name: Build
+        run: |
+          # build the site
+          hugo --minify
+          # remove file generated by the build
+          rm -rf public/
+
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v6
+        with:
+          base: main
+          title: Update theme