Put the bonding engine binary here before packaging:

  resources/srtla_send        (macOS / Linux)
  resources/srtla_send.exe    (Windows)

Where to get it (cross-platform, Rust):
  https://github.com/irlserver/srtla_send
    macOS/Windows:  cargo build --release   ->  target/release/srtla_send[.exe]

Or the original C version (Linux only):
  https://github.com/BELABOX/srtla   ->  make  ->  srtla_send

electron-builder copies this folder to the app's resources/bin at build time; main.js finds it
there in the packaged app, or here (resources/) when running `npm start` in dev.
