Download
Olaf is not distributed as source. This site serves a gzip-compressed tarball with a Linux x86_64-compatible olaf binary:
Extract it, then put olaf on your PATH:
tar -xzf olaf.tar.gz
chmod +x olaf
sudo mv olaf /usr/local/bin/ # or another directory on your PATH
Then follow Setup and Configuration.
The Dockerfile-Website image builds olaf.tar.gz from output/bin/olaf (GOOS=linux) at image build time.