title: how to generate locust html file without UI？
body: <p>how to generate locust html file without UI？</p>
  <pre><code>locustfile = /mnt/locust/locustfile.py
  headless = true
  host = https://uat.xxx.biz
  users = 1000
  spawn-rate = 1
  run-time = 25m
  expect-workers=4
  master
  html=basic.html
  </code></pre>
  <p>I got error</p>
  <blockquote>
  <p>master_1  | locust: error: unrecognized arguments: --html=basic.html</p>
  </blockquote>
  <h3>Edit</h3>
  <p>locust 1.4.1</p>
  <pre><code>docker run -p 127.0.0.1:8089:8089 -v $PWD:/mnt/locust tnt_locust:1.0.0 -f /mnt/locust/locustfile.py --headless -u 10 -r 10 --run-time 15s --html=basicNew.html
  </code></pre>
  <p>Same error as above.</p>