FlyChess: source distribution for unmodified browser Stockfish engines

Stockfish npm package 18.0.8, Stockfish 18 Lite Single:
Source commit: 93c994592dcf3b4b21052ab925e9b534df9c0918
https://github.com/nmrugg/stockfish.js/tree/93c994592dcf3b4b21052ab925e9b534df9c0918
Download stockfish-18.0.8-source.tar.gz from this directory and extract it.
Place nn-9067e33176e8.nnue from this directory in the extracted src/ folder.
The source includes its Makefiles, build.js, license, and build instructions.
Install the upstream-specified Emscripten toolchain (README: 3.1.7), Node.js,
make and the documented build prerequisites, then run:
    node build.js --single-threaded --lite -f
See build.js --help and upstream README for platform details.
No FlyChess-specific changes were made to these engine files.

Lite network author: Linmiao Xu (linrock).
Network SHA-256:
9067e33176e8c5edb7aa8db6a3aedd012f84a1f39872e86357c6c2d0993f314d
Public stockfish-18-lite-single.wasm SHA-256 (identical to npm binary):
a8fbc05ec6920b56d7485826dcb02c5ffd2826bcbf751cf973046f237a9096f1

Legacy Stockfish.js npm package 10.0.2:
Source commit: e105072e84cf8ee5dd5219e2c5be29c3b8bf8a5a
https://github.com/niklasf/stockfish.js/tree/e105072e84cf8ee5dd5219e2c5be29c3b8bf8a5a
Download stockfish-10.0.2-source.tar.gz and follow its Readme.md, Dockerfile,
and build.sh. This older version does not use an NNUE network.

License: GNU GPL v3 (see ../Copying.txt and source archives).
The build tools and platform influence the generated binary; a new build is
not claimed to be bit-for-bit reproducible. The deployed files are unmodified
upstream package artifacts, not custom FlyChess engine builds.