added docker build, closes #106

Dockerfile

@@ -0,0 +1,21 @@
+FROM node:8.11.2
+
+RUN apt-get update && apt-get install -y nasm
+
+# Create app directory
+WORKDIR /usr/src/app
+
+# Install app dependencies
+# A wildcard is used to ensure both package.json AND package-lock.json are copied
+# where available (npm@5+)
+COPY package*.json ./
+
+RUN npm install --production
+# If you are building your code for production
+# RUN npm install --only=production
+
+# Bundle app source
+COPY . .
+
+EXPOSE 8080
+CMD [ "node", "src/www" ]