Update README.md

utils/docker/README.md

@@ -1,47 +1,4 @@
-# Overview
+## Docker Support Files
 
-[Docker](https://www.docker.io/) allows you to quickly spin up application containers, 
-which are similar to very lightweight virtual machines. The ZoneMinder Dockerfile will
-start an Ubuntu 12.04 container with MySql, Apache, and PHP properly configured, and 
-will then compile and install ZoneMinder.
-
-It will also start an SSH server that you can use to log into the container.
-
-This is still a bit of a work in progress.
-
-## How To Use
-
-1. Install [Docker](https://www.docker.io/)  
-2. Build ZoneMinder container
-```sudo docker build -t yourname/zoneminder github.com/ZoneMinder/ZoneMinder```
-3. Run it
-```CID=$(sudo docker run -d -p 222:22 -p 8080:80 --name zoneminder yourname/zoneminder)```
-4. Use it -- you can now SSH to port 222 on your host as user root with password root.
-You can also browse to your host on port 8080 to access the zoneminder web interface
-
-## Developing With Docker
-
-If you wish to contribute to ZoneMinder, Docker can be helpful. By re-running 
-```docker build``` in your working directory, any code modifications you have 
-made will be pulled into a new container, compiled, and started, all without 
-modifying your base system. 
-
-Development is not totally without annoyances, as any change
-to the project will require a full rebuild of all C++. Docker notices that the 
-directory which has been ADD'ed is now different, and therefore all steps after
-the ADD command must be recomputed. A fix for this is to update the Dockerfile to
-move the configure and make commands into start.sh, and then use a volume mount 
-to cache the build directory (I think it's ```/tmp```) on your host filesystem. 
-This would be really useful for a developer, and would remove the annoying build 
-problem, but some of the Docker push/pull benefits would be lost.  
-
-Docker containers can be both CPU and memory limited, so this can be a practical 
-method to compile or run multiple development builds of ZoneFinder simultaneously
-without taxing your host system. 
-
-## Use Cases
-
-## TODO
-- Describe how to connect to monitors by mounting devices
-- Create a 'development' dockerfile to remove the need to rebuild the entire project
-  after each small change
+The files in this folder are used to support our Dockerfiles here:
+https://github.com/ZoneMinder/zmdockerfiles