Changed routing framework from mux to Gin.

Swagger doc is now included in the application.
A fronted can now be hosted from the application.

cmd/main.go

@@ -0,0 +1,20 @@
+package main
+
+import (
+	"embed"
+	"music-server/pkg/conf"
+)
+
+//go:embed frontend/dist
+var frontend embed.FS
+
+//go:embed swagger
+var swagger embed.FS
+
+func main() {
+	conf.SetupDb()
+
+	conf.SetupRestServer(frontend, swagger)
+
+	conf.CloseDb()
+}