add Dockerfile for running tests

.npmignore

@@ -3,3 +3,4 @@ test/
 .project
 .gitmodules
 .travis.yml
+Dockerfile

Dockerfile

@@ -0,0 +1,20 @@
+FROM freewil/bitcoin-testnet-box
+MAINTAINER Sean Lavine <lavis88@gmail.com>
+
+# install node.js (sudo for bash needed?)
+USER root
+RUN apt-get install --yes curl
+RUN curl -sL https://deb.nodesource.com/setup_0.12 | bash -
+RUN apt-get install --yes nodejs
+
+# set permissions for tester user on project
+ADD . /home/tester/node-bitcoin
+RUN chown --recursive tester:tester /home/tester/node-bitcoin
+
+# install module dependencies
+USER tester
+WORKDIR /home/tester/node-bitcoin
+RUN npm install
+
+# run test suite
+CMD ["npm", "test"]