Add rsync to documentation CI container

.forgejo/workflows/doc.yaml

@@ -3,7 +3,7 @@ jobs:
   build-doc:
     runs-on: docker
     container:
-      image: git.tkolb.de/amateurfunk/hamnet70/asciidoctor:1.4
+      image: git.tkolb.de/amateurfunk/hamnet70/asciidoctor:1.5
     steps:
       - uses: actions/checkout@v4
       - run: pwd && ls -hla && cd doc && make
@@ -11,11 +11,11 @@ jobs:
         with:
           name: documentation
           path: doc/out/
-  deploy:
+  deploy-doc:
     needs: build-doc
     runs-on: docker
     container:
-      image: git.tkolb.de/amateurfunk/hamnet70/asciidoctor:1.4
+      image: git.tkolb.de/amateurfunk/hamnet70/asciidoctor:1.5
     steps:
       - run: mkdir ~/.ssh && echo "${{ secrets.SSH_KEY }}" > ~/.ssh/id_ed25519 && chmod 0600 ~/.ssh/id_ed25519 && echo "${{ secrets.SSH_KNOWN_HOST }}" > ~/.ssh/known_hosts
       - uses: actions/download-artifact@v3

doc/docker/Dockerfile

@@ -8,6 +8,9 @@ RUN gem install asciidoctor asciidoctor-diagram
 # tools for diagram generation
 RUN apt install -y --no-install-recommends mscgen && apt clean
 
+# tools for automatic deployment
+RUN apt install -y --no-install-recommends rsync && apt clean
+
 # run as unprivileged user in the container
 RUN useradd -m ciuser
 USER ciuser