We've changed just about everything to do with how we manage bath.ac.uk for the alpha, and this includes the underlying technology.
The live www.bath.ac.uk is hosted dynamically from a monolithic Java-based CMS (OpenCms) running on Solaris servers with Oracle as a back-end database and all the code is in Subversion.
The alpha site is being served from static HTML files generated by Hugo. The inputs are provided by multiple Ruby on Rails apps running on Linux servers using MySQL, MongoDB and an off-site service for data storage, and all the code is in our local GitHub Enterprise installation and is deployed from Bamboo by Mina.
The difference could not really be much bigger! It's certainly been a challenge to get up to speed with so many new things all at once but we think that this stack, or some version of it - that's what alphas are for! - should be more future-friendly than our existing infrastructure.
We'll go into more detail on how we're using each piece of technology in the following days and weeks.