message: Add prebuilt binary for Alpine
diff: "coverage": "nyc report -r lcovonly",
  "rebuild": "npm run install --build-from-source",
  "prebuild": "prebuildify -t 8.14.0 --napi --strip",
  - "prebuild-linux-x64": "prebuildify-cross -i centos7-devtoolset7 -t 8.14.0 --napi --strip",
  + "prebuild-linux-x64": "prebuildify-cross -i centos7-devtoolset7 -i alpine -t 8.14.0 --napi --strip",
  "prebuild-darwin-x64": "prebuildify -t 8.14.0 --napi --strip",
  "prebuild-win32-x64": "prebuildify -t 8.14.0 --napi --strip",
  "download-prebuilds": "prebuildify-ci download",
  