Fix nvm url in Dockerfile

3 jobs for master in 8 minutes and 56 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Lint
passed #15170
lint

00:01:18

 
  Test Backend
passed #15171
test_backend

00:04:42

 
  Test Frontend
passed #15172
test_frontend_unit

00:02:56