The package manpage is written in Markdown and we can use pandoc to convert it into the correct format.
arm64 host:
cd ~
wget https://github.com/jgm/pandoc/releases/download/2.19.2/pandoc-2.19.2-1-arm64.deb
sudo apt install ~/pandoc-2.19.2-1-arm64.deb
First time:
cd {repo}/scripts
chmod +x manpage.sh
Run manpage.sh from the scripts dir:
./manpage.sh
man ./wlanpi-webui.1