use marp docker image for rendering

.gitea/workflows/build.yaml

@@ -6,31 +6,18 @@ jobs:
     name: build marp presentation
     runs-on: ubuntu-latest
     steps:
-      - name: restore cache
+      - name: build html presentation
-        id: restore-cache
-        uses: actions/cache@v3
-        with:
-          path: /opt/
-          key: marp-renderer-${{ hashFiles('./.gitea/workflows/build.yaml') }}
-      - name: checkout
-        uses: actions/checkout@v4
-      - name: install marp toolchain
-        if: steps.restore-cache.outputs.cache-hit != 'true'
-        run: |
-          npm i -g -y @marp-team/marp-cli@latest playwright && \
-          PLAYWRIGHT_BROWSERS_PATH=/opt/browsers playwright install --with-deps chrome
-      - name: cache marp installation
-        if: steps.restore-cache.outputs.cache-hit != 'true'
-        uses: actions/cache/save@v3
-        with:
-          path: /opt/
-          key: marp-renderer-${{ hashFiles('./.gitea/workflows/build.yaml') }}
-      - name: build presentation
         working-directory: ./presentation
+        uses: docker://marpteam/marp-cli:latest
+        with:
+          args: ./presentation.md -o ./index.html --html --theme-set ./themes --
+      - name: build pdf presentation
+        working-directory: ./presentation
+        uses: docker://marpteam/marp-cli:latest
+        with:
+          args: --html --allow-local-files -o presentation.pdf --theme-set ./themes --
+      - name: compress as zip
         run: |
-          export PLAYWRIGHT_BROWSERS_PATH=/opt/browsers && \
-          marp presentation.md --html -o index.html --theme-set ./themes -- && \
-          marp presentation.md --html --browser-path "/opt/google/chrome/google-chrome" --allow-local-files -o presentation.pdf --theme-set ./themes -- && \
           zip -r ../presentation.zip .
       - name: upload to pages
         run: |