improved mainclass Server, and started a server for testing

Server/src/main/java/uulm/teamname/marvelous/server/Server.java

@@ -1,6 +1,7 @@
 package uulm.teamname.marvelous.server;
 
 import com.beust.jcommander.JCommander;
+import com.beust.jcommander.ParameterException;
 import org.tinylog.Logger;
 import org.tinylog.configuration.Configuration;
 import uulm.teamname.marvelous.gamelibrary.config.CharacterConfig;
@@ -32,14 +33,21 @@ public class Server {
 
         ServerArgs serverArgs = new ServerArgs();
 
-        JCommander.newBuilder()
-                .addObject(serverArgs)
-                .build()
-                .parse(args);
+        try {
+            JCommander.newBuilder()
+                    .addObject(serverArgs)
+                    .build()
+                    .parse(args);
+        } catch (ParameterException e) {
+            Logger.error("Invalid parameters: {}", e.getMessage());
+            System.exit(1);
+        }
 
         System.out.println(serverArgs);
 
-        if (serverArgs.isVerbose()) {
+        if (serverArgs.isVerbose() || serverArgs.isCheckConfig()) {
+            // If checkConfig, the LogLevel is also set to max, because more information
+            // is exactly what checking the requirements means
             setLogLevel(5);
         } else {
             setLogLevel(serverArgs.getLogLevel());
@@ -50,9 +58,22 @@ public class Server {
         CharacterConfig characterConfig = readCharacterConfig(serverArgs.getCharacterConfigFile());
         PartyConfig partyConfig = readPartyConfig(serverArgs.getMatchConfigFile());
 
-        InetSocketAddress address = new InetSocketAddress(serverArgs.getPort());
+        // If only configurations should be checked, the server exits here
+        if (serverArgs.isCheckConfig()) {
+            Logger.info("Exiting as configuration file check is done");
+            System.exit(0);
+        }
+
+        InetSocketAddress address = new InetSocketAddress("localhost", serverArgs.getPort());
         Logger.trace("Inet address {} created", address);
 
+        var json = new JSON(characterConfig);
+        Logger.trace("New JSON instance created with characterConfig");
+
+        MarvelousServer netConnector = new MarvelousServer(address, json);
+        System.out.println("Starting server");
+        netConnector.start();
+        System.out.println("Server started");
 
 
     }