message: feat(cli): Use tagged version of default Docker image
diff: @@ -38,7 +38,7 @@ const build = (sourceDir) => {
  process.exit(dockerVersion.status)
  }
  - let dockerImage = 'insighttoolkit/itk-js'
  + let dockerImage = 'insighttoolkit/itk-js:20190317-5d260e3'
  if (program.commands[0].image) {
  dockerImage = program.commands[0].image
  }
  