Add Dockerfile

Include testing db in container.

Dockerfile

@@ -0,0 +1,30 @@
+# Dockerfile # Spectral Workbench 
+# https://github.com/publiclab/spectral-workbench
+
+FROM ruby:2.1.2
+MAINTAINER Sebastian Silva "sebastian@fuentelibre.org"
+
+LABEL "This image deploys Spectral Worbench!"
+
+# Set correct environment variables.
+RUN mkdir -p /app
+ENV HOME /root
+
+# Install dependencies
+RUN apt-get update -qq && apt-get install -y imagemagick ruby-rmagick libmagickwand-dev libmagick++-dev bundler libmysqlclient-dev ruby-rmagick libfreeimage3 libfreeimage-dev ruby-dev gdal-bin python-gdal curl libcurl4-openssl-dev libssl-dev zip nodejs-legacy npm
+RUN npm install -g bower
+
+# Install bundle of gems
+WORKDIR /tmp
+ADD Gemfile /tmp/Gemfile
+RUN bundle install 
+ADD Gemfile.lock /tmp/Gemfile.lock
+
+# Add the Rails app
+WORKDIR /app
+ADD . /app
+RUN bower install --allow-root
+
+RUN bundle exec rake db:setup
+RUN bundle exec rake db:seed
+RUN bundle exec rake db:migrate