add ./script/doc to build fig documentation using the docs.docker.com tooling

Signed-off-by: Sven Dowideit <SvenDowideit@home.org.au>

docs/Dockerfile

@@ -0,0 +1,15 @@
+FROM docs/base:latest
+MAINTAINER Sven Dowideit <SvenDowideit@docker.com> (@SvenDowideit)
+
+# to get the git info for this repo
+COPY . /src
+
+# Reset the /docs dir so we can replace the theme meta with the new repo's git info
+RUN git reset --hard
+
+RUN grep "__version" /src/compose/__init__.py | sed "s/.*'\(.*\)'/\1/" > /docs/VERSION
+COPY docs/* /docs/sources/compose/
+COPY docs/mkdocs.yml /docs/mkdocs-compose.yml
+
+# Then build everything together, ready for mkdocs
+RUN /docs/build.sh