Added Dockerfile + instructions

.dockerignore

+.DS_Store
+node_modules/
+.env
+tmp/
+editor/js/*
+junk/
+media/
+*.log
+.jobs

Dockerfile

+FROM ubuntu:16.04
+
+# Install dependencies
+RUN apt-get update --yes && apt-get upgrade --yes
+RUN apt-get install git nodejs npm \
+libcairo2-dev libjpeg8-dev libpango1.0-dev libgif-dev build-essential g++ \
+ffmpeg \
+libgroove-dev zlib1g-dev libpng-dev \
+redis-server --yes
+
+RUN ln -s `which nodejs` /usr/bin/node
+
+# Non-privileged user
+RUN useradd -m audiogram
+USER audiogram
+
+# Clone repo
+RUN git clone https://github.com/nypublicradio/audiogram.git
+WORKDIR /home/audiogram/audiogram
+
+# Install dependencies
+RUN npm install

INSTALL.md

 
 If you're using a particularly fancy distributed setup you'll also need to install [Redis](http://redis.io/).
 
-Installation has been tested on Ubuntu 14.04 and 15.04. It has also been tested on various Mac OS X environments, with various degrees of Homebrew Hell involved.
+Installation has been tested on Ubuntu 14.04, 15.04, and 16.04. It has also been tested on various Mac OS X environments, with various degrees of Homebrew Hell involved.
 
 This would theoretically work on Windows, but it hasn't been tested.
 
+You can skip almost all of the installation if you use [Docker](#docker-installation).
+
 ## Ubuntu 14.04+ installation
 
 Note: if you're using something with very little memory, like a Digital Ocean micro droplet, it might cause an installation problem on the last step. See [Linux troubleshooting](INSTALL.md#linux-troubleshooting) below for how to fix it.
 npm install
 ```
 
+## Docker installation
+
+If you use [Docker](https://www.docker.com/products/docker), you can build an image from the included Dockerfile.
+
+
+
+You can clone the repo and build an image, or build it directly from the repo:
+
+```sh
+git clone https://github.com/nypublicradio/audiogram.git
+cd audiogram
+docker build -t audiogram .
+```
+
+or
+
+```sh
+docker build -t https://github.com/nypublicradio/audiogram.git
+
+Now you can run Audiogram in a container using that image:
+
+```sh
+docker run -p 8888:8888 -t -i audiogram
+```
+
 ## Mac troubleshooting
 
 If things aren't working on a Mac, there are a few fixes you can try.