Raw, optimized, and meta WASM binaries can be found in the Releases section.
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
rustup toolchain add nightly
rustup target add wasm32-unknown-unknown --toolchain nightly
... or ...
make prepare
cargo +nightly build --release
... or ...
make
The source code is licensed under GPL v3.0 license.