Use ARM Bookdown image in Forgejo CI

.forgejo/workflows/book.yml

@@ -14,7 +14,7 @@ jobs:
   book:
     runs-on: docker
     container:
-      image: rocker/verse:4.4.3
+      image: eacompanion-bookdown:1
     steps:
       - name: Check out the repository
         uses: actions/checkout@v4
@@ -29,11 +29,8 @@ jobs:
         env:
           DEPLOY_KEY: ${{ secrets.EACOMPANION_DEPLOY_KEY }}
         run: |
-          apt-get update
-          apt-get install -y --no-install-recommends openssh-client
           install -d -m 0700 "$HOME/.ssh"
           printf '%s\n' "$DEPLOY_KEY" > "$HOME/.ssh/id_ed25519"
           chmod 0600 "$HOME/.ssh/id_ed25519"
           printf '%s\n' '[81.187.28.216]:12 ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDKyA1+5/gU2P27AuDbk2SRNFeuumRP9pEicZc7zu51n' > "$HOME/.ssh/known_hosts"
           tar -C _book -czf - . | ssh -p 12 eacompanion@81.187.28.216 "deploy ${{ forgejo.sha }}"
-

deploy/Dockerfile.bookdown

@@ -0,0 +1,16 @@
+FROM debian:trixie-slim
+
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends \
+      ca-certificates \
+      git \
+      nodejs \
+      openssh-client \
+      pandoc \
+      r-base \
+      r-cran-bookdown \
+      r-cran-rmarkdown \
+    && rm -rf /var/lib/apt/lists/*
+
+ENV HOME=/root
+WORKDIR /workspace