Added dockerfile that installs sails, pm2 and creates the server folder.

Dockerfile

@@ -0,0 +1,28 @@
+############################################################
+# Dockerfile to that builds on top of nginx to run
+# a sails app with PM2
+############################################################
+
+
+FROM dockerfile/nodejs
+
+MAINTAINER Markus Padourek <markus@artificial.io>
+
+RUN npm install -g pm2 sails grunt bower
+RUN mkdir /server
+
+#installs nginx to /usr/sbin/nginx
+#conf file is at /etc/nginx/nginx.conf
+
+# Define mountable directories.
+VOLUME ["/server/"]
+
+# Define working directory.
+WORKDIR /server
+
+# Define default command.
+#CMD ["pm2"]
+
+# Expose ports.
+EXPOSE 1337
+EXPOSE 3000