Documentation for current and previous releases is on Github Pages.
You can look at test/index.html for an example to embed avrdude in your webpage!
Install emsdk using this guide
Then you can run:
cmake -B build -S . -DCMAKE_TOOLCHAIN_FILE=$EMSDK/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake
to configure your CMake project.
To build everything use:
cmake --build build --target test
Congrats! You've build your own version, in your build dir under test you can run vite and open that link.
You should be able to upload an example blink program at PWM pin 3.