New documentation

First commit, halfway through a major restructuring of documentation.

docs/Dockerfile

@@ -0,0 +1,14 @@
+FROM jekyll/builder
+
+WORKDIR /tmp
+ADD Gemfile /tmp/
+ADD Gemfile.lock /tmp/
+RUN bundle install
+
+FROM jekyll/jekyll
+
+VOLUME /src
+EXPOSE 4000
+
+WORKDIR /src
+ENTRYPOINT ["jekyll", "serve", "--livereload", "-H", "0.0.0.0"]