chore: require at least one database connection

config/config.go

@@ -21,7 +21,7 @@ import (
 )
 
 const (
-	defaultConfigPath          = "config.yml"
+	defaultConfigPath = "config.yml"
 
 	SQLDialectMysql    = "mysql"
 	SQLDialectPostgres = "postgres"
@@ -312,6 +312,10 @@ func Load() *Config {
 		logbuch.Fatal("either of listen_ipv4 or listen_ipv6 must be set")
 	}
 
+	if config.Db.MaxConn <= 0 {
+		logbuch.Fatal("you must allow at least one database connection")
+	}
+
 	Set(config)
 	return Get()
 }