Add flag for only checking/creating the config file

flags.go

@@ -18,6 +18,11 @@ var (
 		"Info",
 		"Set the logging level. Options are: Trace, Debug, Info, Warning, Error, Fatal. Capitalisation doesn't matter. Defaults to Info",
 	)
+	flagConfigOnly *bool = flag.Bool(
+		"validate-config",
+		false,
+		"If set, the server will only validate the config (or write the default one) and then quit",
+	)
 )
 
 func init() {

main.go

@@ -39,6 +39,12 @@ func main() {
 			Str("config-file", *flagConfigFile).
 			Msg("Failed to read config and couldn't write default")
 	}
+
+	// Request to only check config
+	if *flagConfigOnly {
+		return
+	}
+
 	storageCache, err := cache.NewCache(
 		config.GlobalConfig.Storage.MaxInMemoryCacheSize,
 		config.GlobalConfig.Storage.RedisUrl,