Changed the structure of the whole application, should be no changes to functionality.

cmd/backend/main.go

@@ -0,0 +1,13 @@
+package main
+
+import (
+	"music-server/pkg/conf"
+)
+
+func main() {
+	conf.SetupDb()
+
+	conf.SetupRestServer()
+
+	conf.CloseDb()
+}