Riizade/config file (#520)

* added POJO + yaml file

* made config members public

* switched to yaml

* modified files to use YamlConfig over ServerConstants

* removed constants from ServerConstants

* removed unused imports

* removed unused import

* removed world ini

* removed now unused .ini files

* fixed docker-launch.sh

* added jackson dependency JARs

* fixed errors

* removed unused server config values, added world defaults

* don't use env variables for docker

* fixed package imports/specifiers for js files

src/net/server/channel/handlers/EnterMTSHandler.java

@@ -28,6 +28,7 @@ import java.sql.SQLException;
 import java.util.ArrayList;
 import java.util.List;
 
+import config.YamlConfig;
 import constants.ServerConstants;
 import client.MapleCharacter;
 import client.MapleClient;
@@ -49,11 +50,11 @@ public final class EnterMTSHandler extends AbstractMaplePacketHandler {
     public final void handlePacket(SeekableLittleEndianAccessor slea, MapleClient c) {
         MapleCharacter chr = c.getPlayer();
         
-        if(!chr.isAlive() && ServerConstants.USE_BUYBACK_SYSTEM) {
+        if(!chr.isAlive() && YamlConfig.config.server.USE_BUYBACK_SYSTEM) {
             BuybackProcessor.processBuyback(c);
             c.announce(MaplePacketCreator.enableActions());
         } else {
-            if (!ServerConstants.USE_MTS) {
+            if (!YamlConfig.config.server.USE_MTS) {
                 c.announce(MaplePacketCreator.enableActions());
                 return;
             }