fix Dockerfile.asciidoc

Signed-off-by: Dscano <[email protected]>

docs/tools/Dockerfile.asciidoc

@@ -3,17 +3,27 @@ LABEL maintainer="P4 API Working Group <[email protected]>"
 LABEL description="Dockerfile used for building the asciidoc specification"
 
 RUN  apt-get update && \
-     apt-get install -y cmake flex bison libglib2.0-dev libcairo2-dev libpango1.0-dev libxml2-dev libwebp-dev libzstd-dev libgdk-pixbuf-2.0-dev
+     apt-get install -y cmake flex bison libglib2.0-dev libcairo2-dev libpango1.0-dev libxml2-dev libwebp-dev libzstd-dev libgdk-pixbuf-2.0-dev git
 
-RUN   gem install asciidoctor \
-      gem install asciidoctor-pdf \
-      gem install asciidoctor-mathematical \
-      gem install asciidoctor-bibtex\
-      gem install asciidoctor-lists\
+RUN   gem install asciidoctor && \
+      echo 'gem: --no-document' > /etc/gemrc && \
+      gem install nokogiri && \
+      gem install rghost && \
+      gem install asciidoctor-diagram && \
+      gem install asciidoctor-plantuml && \
+      gem install asciidoctor-pdf --version 2.3.18 && \
+      gem install asciidoctor-pdf-cjk && \
+      gem install asciidoctor-lists --version 1.1.2 && \
+      gem install coderay pygments.rb thread_safe && \
+      gem install slim && \
+      gem install concurrent-ruby && \
+      gem install haml tilt && \
+      gem install asciidoctor-mathematical && \
+      gem install asciidoctor-bibtex &&\
       git clone https://github.com/rouge-ruby/rouge &&\
-      cd rouge \
-      git log -n 1 | cat \
-      gem build rouge.gemspec \ 
+      cd rouge && \
+      git log -n 1 | cat && \
+      gem build rouge.gemspec && \ 
       gem install rouge 
 
 VOLUME ["/usr/src/p4-spec"]