Docker command failed

[claudebarde]

Running npm run test outputs the following error message:

Error: Command failed: docker run -v $PWD:$PWD --rm -i ligolang/ligo:next compile-contract --michelson-format=json $PWD/contracts/Token.ligo main

    at ChildProcess.exithandler (child_process.js:303:12)
    at ChildProcess.emit (events.js:315:20)
    at maybeClose (internal/child_process.js:1021:16)
    at Socket.<anonymous> (internal/child_process.js:443:11)
    at Socket.emit (events.js:315:20)
    at Pipe.<anonymous> (net.js:674:12) {
  killed: false,
  code: 125,
  signal: null,
  cmd: 'docker run -v $PWD:$PWD --rm -i ligolang/ligo:next compile-contract --michelson-format=json $PWD/contracts/Token.ligo main'