  * build typescript code
    when needed Node.js modules are in Debian:
    + awaitqueue
    + netstring
    + node-sctp
  * check testsuite
    when needed Node.js module is in Debian:
    + node-pick-port
  * lint-check code
    when needed Node.js modules are in Debian:
    + eslint-plugin-jest
    + @typescript-eslint/eslint-plugin
    + @typescript-eslint/parser
