Run
peakrdl html d1-h_gpio.rdl -o html
This will build the dynamic website into ./html/. To access and use, see below.
Directly opening index.html will not work.
First, run on local server using python:
python3 -m http.server -d "[path-to-dir]/html/"
Then, can open on http://localhost:8000!
Hint: For Windows PowerShell, can copy the current path using:
pwd | Set-Clipboard