Sparrow is a front-end forum software using a Matrix homeserver as its back-end. This means that, as long as you have a homeserver set up somewhere, hosting Sparrow will only consist in serving its front-end content and pointing it to the said homeserver.
N.B.: Although this is technically possible, it is highly recommended not to point Sparrow to the matrix.org homeserver, as the computation of the list of topic will be made really slow because of the number of public rooms on this server and the current performances of the Matrix public rooms directory computation in Synapse.
This project is still under heavy development, and might change in a drastic way without any warning. It is far from being ready for production.
git clone https://github.com/babolivier/sparrow cd sparrow npm install npm run build
Coming soon (even though I hate READMEs saying that)...