Write docs

README.md

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 # lantern
 [![CircleCI](https://img.shields.io/circleci/project/github/RealOrangeOne/lantern.svg?style=flat-square)](https://circleci.com/gh/RealOrangeOne/lantern)
 
-Write a web server in any language
+Write a web server in _almost_ any language.
+
+## Usage
+    $ lantern --help
+    usage: lantern [-h] [--port PORT] handler
+
+    positional arguments:
+    handler      Executable to run
+
+    optional arguments:
+    -h, --help   show this help message and exit
+    --port PORT  Port to listen on
+
+`handler` should be your executable program. It should be executable without any additional arguments (eg `./handler.py`).
+
+## How it works
+When a request is sent to lantern, the handler program is called, and request data passed through `stdin`. Anything passed to `stdout` will be returned to the client. This data must be standard text / HTML.
+
+You can't really write it in a language that doesn't support reading from `stdin` / writing to `stdout`, but almost all languages support this.
+
+### Request Data
+Request data is fetched from sanic, and serialized to JSON. THe exact keys serialized can be found in `lantern/request.py`, and descriptions can be found in the [sanic docs](http://sanic.readthedocs.io/en/latest/sanic/request_data.html).
+
+Additionally, there's also the [useragent](https://github.com/lixxu/sanic-useragent) plugin installed, which adds useragent data to the request at `useragent`.
+
+## Why
+I build this simply for testing, I wanted to have a play around with [sanic](https://github.com/channelcat/sanic/), and needed something to help me do [this project]().
+
+## _"Can I use this in production?"_
+Technically yes, there's nothing stopping you, But please, __Please__ don't!
+
+Whilst thanks to [sanic](https://github.com/channelcat/sanic/) it's super fast, it's not designed to be secure, scalable, or even particularly stable.
+
+If you want to use a language in production, use a web framework in that language, eg [Django](https://www.djangoproject.com/) or [Hyper](https://hyper.rs/).
+
+## Examples
+See the `examples/` directory for some basic examples. eg:
+
+    $ lantern examples/simple.sh