Checkout a clone of the fusion-index repository and install it:
$ cd path/to/fusion-index/checkout
$ pip install -r requirements.txt
# It's recommended to install with `-e` to avoid having to constantly
# reinstall when changing branches or making changes.
$ pip install -e .
Run the software:
# Create a directory for deployment artefacts.
$ mkdir -p ~/deployment/fusion-index
$ cd ~/deployment/fusion-index
# Start the service on port 8090.
$ twistd --pidfile '' -n fusion-index -p tcp:8090