Embed resources into presentation

.gitea/workflows/build-image.yml

@@ -34,7 +34,7 @@ jobs:
         run: pandoc -t revealjs --resource-path=.:presentation/src/ -s presentation/src/essaimage.md -o presentation/src/essaimage.html
 
       - name: Build presentation formation-signature
-        run: pandoc --from markdown+emoji -t revealjs --resource-path=.:presentation/src/ -s presentation/src/formation-signature.md -o presentation/src/formation-signature.html
+        run: pandoc --from markdown+emoji -t revealjs --embed-resources --resource-path=.:presentation/src/ -s presentation/src/formation-signature.md -o presentation/src/formation-signature.html
 
       - name: Set up Docker Buildx
         uses: https://github.com/docker/setup-buildx-action@v3