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)
Status Name Job ID Coverage
  Review
manual review_docs #48355
docker allowed to fail manual
manual review_front #48354
docker allowed to fail manual
 
  Lint
passed black #48356

00:01:06

passed flake8 #48357

00:00:34

 
  Test
passed test_api #48358
docker

00:04:50

passed test_front #48359
docker

00:01:54