Adding docker compose guide

Author: Ric Harvey

README.md

@@ -60,3 +60,4 @@ For more detailed examples and explanations please refer to the documentation.
 
 ## Guides
 - [Running in Kubernetes](https://github.com/ngineered/nginx-php-fpm/blob/master/docs/guides/kubernetes.md)
+- [Using Docker Compose](https://github.com/ngineered/nginx-php-fpm/blob/master/docs/guides/docker_compose.md)

docs/guides/docker_compose.md

@@ -0,0 +1,28 @@
+
+## Docker Compose Guide
+This guide will show you how to make a quick and easy docker compose file to get your container running using the compose tool.
+
+
+### Creating a copomse file
+Create a docker-compose.yml file with the following contents:
+
+```
+version: '2'
+
+services:
+  nginx-php-fpm:
+    image: richarvey/nginx-php-fpm:latest
+    restart: always
+    environment:
+      SSH_KEY: '<YOUR _KEY_HERE>'
+      GIT_REPO: 'git@github.com:<YOUR_ACCOUNT>/<YOUR_REPO?.git'
+      GIT_EMAIL: 'void@ngd.io'
+      GIT_NAME: '<YOUR_NAME>'
+```
+You can of course expand on this and add volumes, or extra environment parameters as defined in the [config flags](../config_flags.md) documentation.
+
+### Running
+To start the container simply run: ```docker-compose up -d```
+
+### Clean Up
+To shut down the compose network and container runt he following command: ```docker-compose down```