Build docker-compose functionality for easier set-up (#257)

Switch to Docker-based local build & update docs

Author: cooldragontattoo

Dockerfile

@@ -0,0 +1,9 @@
+FROM ruby
+
+RUN gem install bundler -v 2.3.18
+
+WORKDIR /usr/src/app
+
+COPY . . 
+
+RUN bundle install

Gemfile

@@ -1,7 +1,4 @@
 source 'https://rubygems.org'
 
-require 'json'
-require 'open-uri'
-versions = JSON.parse(open('https://pages.github.com/versions.json').read)
-
-gem 'github-pages', versions['github-pages']
+gem 'github-pages'
+gem "webrick", "~> 1.7"

README.md

@@ -2,44 +2,22 @@
 
 A site for the CFPB to share and discuss its technology work with the world.
 
-## Running it locally
+## Running it locally with Docker
 
 Content editors and developers probably want to set up cfpb.github.io on
 their local machine so they can preview updates without pushing to GitHub.
 
-Before you get started make sure you have an up-to-date version of Ruby and Bundler.
-We use [Homebrew](http://brew.sh/):
-
-```sh
-brew install ruby
-gem install bundler
-```
-
-As the site is intended to be deployed on GitHub Pages, installing the
-GitHub Pages gem is the best way to install Jekyll and related dependencies.
-Run the following command to install it:
-
-```sh
-bundle install
-```
-
-**Note:** As of 6/23/16, you may need to run this command before running
-`bundle install` to handle a bug in one of the dependencies:
-
-```sh
-bundle config build.nokogiri --use-system-libraries
-```
+Before you get started, make sure you have an up-to-date version of [Docker](https://www.docker.com/get-started/) installed on your machine and that it is running.
 
 [Fork and clone the repo](https://help.github.com/articles/fork-a-repo/)
 to your local machine.
 
-From the project directory, run Jekyll:
-
+Using terminal, in the project directory, run:
 ```sh
-bundle exec jekyll serve --watch
-```
+docker-compose up
+``` 
 
-Open it up in your browser: <http://localhost:4000/>
+Open it up in your browser: [http://localhost:4000/](http://localhost:4000/)
 
 
 ## Working with the front end

docker-compose.yaml

@@ -0,0 +1,11 @@
+version: '3'
+
+services:
+  web:
+    build: .
+    container_name: cfpb-io-container
+    command: bundle exec jekyll serve --host 0.0.0.0
+    volumes:
+      - .:/usr/src/app
+    ports:
+      - "4000:4000"