Added Dockerfile + Change storage default to 'file'

Dockerfile

@@ -0,0 +1,18 @@
+FROM    centos:centos6
+RUN     yum install -y epel-release
+RUN     yum install -y nodejs npm
+
+# Create app directory
+RUN mkdir -p /usr/src/app
+WORKDIR /usr/src/app
+
+# Install app dependencies
+COPY package.json /usr/src/app/
+RUN npm install
+
+# Bundle app source
+COPY . /usr/src/app
+
+EXPOSE 7777
+CMD [ "npm", "start" ]
+