Revised and updated Dockerfile.

It's now in the Docker hub, readily available, and it's also open for
the public. Actually, the indicated error was due to the fact that the
original Dockerfile had to be run in the docs directory. It was more
oriented to testing and running locally than to actually contain. That
one has been moved to the no-docs tag, and is still available.

Anyway, this adds docs also, top of the README, and it closes #2525

Author: JJ

Dockerfile

@@ -31,6 +31,6 @@ WORKDIR /perl6/doc
 COPY . .
 RUN make test && make html
 
-EXPOSE  3000
+EXPOSE 3000
 
-CMD ["morbo", "-w", "assets/sass", "-w", "assets/js", "-w", "html/js/search.js", "-l", "http://*:3000", "app.pl"]
+CMD ["morbo", "-w", "assets/sass", "-w", "assets/js", "-w", "html/js/search.js", "-l", "http://0.0.0.0:3000", "app.pl"]

README.md

@@ -8,6 +8,24 @@ This is currently the recommended way to consume the documentation.
 There is also a command line tool called `p6doc`, which you can use to
 browse the documentation once it's installed (see below).
 
+## Docker container
+
+This documentation is also published as
+the
+[`jjmerelo/perl6-doc`](https://cloud.docker.com/repository/docker/jjmerelo/perl6-doc/) Docker
+container. It includes a copy of the web publised in port 3000, so you
+can run it with:
+
+    docker run --rm -it -p 3000:3000 jjmerelo/perl6-doc
+
+or
+
+    docker run --rm -it -p 31415:3000 jjmerelo/perl6-doc
+
+in case you want it published somewhere else. You can direct your
+browser to http://localhost:3000 (or 31415, as the case may be).
+
+
 ## README in other languages
 
 * [README in Chinese](resources/i18n/zh/README.zh.md)