Modify database URL to create missing databases

Updated the database connection URL to include the `createDatabaseIfNotExist=true` parameter. This ensures the database is automatically created if it does not already exist, improving usability and reducing manual configuration steps.

src/main/java/me/bobert/netneutrality/db/DatabaseConfig.java

@@ -38,7 +38,8 @@ public record DatabaseConfig(String url, String user, String password) {
         String dbPass = settings.get("MYSQL_PASSWORD", "");
         String dbHost = settings.get("MYSQL_HOST", "localhost");
         String dbPort = settings.get("MYSQL_PORT", "3306");
-        return new DatabaseConfig(String.format("jdbc:mysql://%s:%s/%s", dbHost, dbPort, dbName), dbUser, dbPass);
+        String url = String.format("jdbc:mysql://%s:%s/%s?createDatabaseIfNotExist=true", dbHost, dbPort, dbName);
+        return new DatabaseConfig(url, dbUser, dbPass);
     }
 
     @Override