Fix nvm url in Dockerfile

3 jobs for master in 9 minutes and 34 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Lint
passed #15153
lint

00:01:35

 
  Test Backend
passed #15154
test_backend

00:04:58

 
  Test Frontend
passed #15155
test_frontend_unit

00:03:01