* Docs theme to match ENiGMA website

* New docs layout ready for github pages serving
* Tonnes of new docs
* Update gitignore
* Probably other stuff too

docs/installation/docker.md

@@ -0,0 +1,21 @@
+---
+layout: page
+title: Docker
+---
+**You'll need Docker installed before going any further. How to do so are out of scope of these docs, but you can find full instructions 
+for every operating system on the [Docker website](https://docs.docker.com/engine/installation/).**
+
+## Quick Start
+
+Download and run the ENiGMA½ BBS image: 
+
+    docker run -d \
+      -p 8888:8888 \
+      davestephens\enigma-bbs
+
+As no config has been supplied the container will use a basic one so that it starts successfully. Note that as no persistence 
+directory has been supplied, once the container stops any changes made will be lost!
+
+## Customised Docker Setup
+
+TBC using Docker Compose