Added mariadb

src/main/java/org/openautonomousconnection/insserver/Main.java

@@ -43,7 +43,7 @@ public class Main {
         if (!config.isSet("db.url")) {
             config.set(
                     "db.url",
-                    "jdbc:mysql://localhost:3306/ins?useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC"
+                    "jdbc:mariadb://localhost:3306/ins?useUnicode=true&characterEncoding=utf8"
             );
             config.saveProperties();
         }