docker-compose: fix music dir being mounted in the wrong place for nginx

6 jobs for patch-1 in 5 minutes and 57 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Review
manual #48355
docker allowed to fail manual
review_docs
manual #48354
docker allowed to fail manual
review_front
 
  Lint
passed #48356
black

00:01:06

passed #48357
flake8

00:00:34

 
  Test
passed #48358
docker
test_api

00:04:50

passed #48359
docker
test_front

00:01:54