Watch for config changes and apply them live

api/webserver/webserver.go

cmd/media_repo/inits.go

cmd/media_repo/main.go

cmd/media_repo/reloads.go

common/config/config.go

common/config/watch.go

common/globals/reload.go

common/globals/singleflight_groups.go

config.sample.yaml

docs/config.md

go.mod

go.sum

metrics/webserver.go

storage/storage.go