Add docker support

Dockerfile

@@ -0,0 +1,17 @@
+FROM ubuntu:trusty
+
+RUN sudo apt-get install software-properties-common --yes
+RUN sudo apt-add-repository ppa:ansible/ansible --yes
+RUN sudo apt-get update --yes
+RUN sudo apt-get install ansible --yes
+RUN sudo apt-get install make --yes
+RUN sudo apt-get install gawk --yes
+RUN sudo apt-get install wget --yes
+
+RUN mkdir -p /t2-build
+WORKDIR /t2-build
+COPY ansible.yml ansible.yml
+RUN ansible-playbook -i "localhost," -c local ansible.yml --extra-vars "build_dir_owner=root"
+WORKDIR /work
+RUN git clone https://github.com/tessel/openwrt-tessel.git --recursive
+RUN git clone https://github.com/tessel/t2-firmware --recursive

README.md

@@ -1,8 +1,11 @@
 # t2-build
 
-Ansible and Vagrant scripts for building t2. Targets a Ubuntu 14.04 installation or VM.
+Ansible, Docker, and Vagrant scripts for building t2. Targets a Ubuntu 14.04 installation or VM.
 
-```
+
+## vagrant
+
+```bash
 vagrant up
 vagrant ssh
 $ cd /work
@@ -15,6 +18,19 @@ $ cd t2-firmware
 $ make -j64
 ```
 
+## docker
+
+```bash
+$ docker build -t t2 .
+$ docker create -t -i t2 bash
+5bfbfd883d3ee815682a389e55a80551a59df767945cd831e89e6b2f502df67d
+$ docker start -a -i 5bfbfd883d3ee815682a389e55a80551a59df767945cd831e89e6b2f502df67d
+```
+
+This will land you in bash in the /work directory, with a subdirectory for the
+firmware and openwrt-tessel repos.  You can run `make -j50 V=s` to build the
+OpenWRT image inside openwrt-tessel.
+
 # license
 
 mit/asl2