Allow changing remote address, port and bind port via cli arguments

bootstrap/bukkit/src/main/java/org/dragonet/proxy/init/bukkit/ProxyBukkitPlugin.java

@@ -36,7 +36,7 @@ public void onEnable() {
         getDataFolder().mkdir();
 
         // Initialize the main proxy class
-        proxy = new DragonProxy(PlatformType.BUKKIT, getDataFolder(), -1);
+        proxy = new DragonProxy(PlatformType.BUKKIT, getDataFolder());
     }
 
     @Override

bootstrap/standalone/src/main/java/org/dragonet/proxy/init/Bootstrap.java

@@ -43,6 +43,8 @@ public static void main(String[] args) {
         OptionParser optionParser = new OptionParser();
         optionParser.accepts("version", "Displays the proxy version");
         OptionSpec<String> bedrockPortOption = optionParser.accepts("bedrockPort", "Overrides the bedrock UDP bind port").withRequiredArg();
+        OptionSpec<String> remoteAddressOption = optionParser.accepts("remoteAddress", "Overrides the remote address in the config").withRequiredArg();
+        OptionSpec<String> remotePortOption = optionParser.accepts("remotePort", "Overrides the remote port in the config").withRequiredArg();
         optionParser.accepts("help", "Display help/usage information").forHelp();
 
         // Handle command-line options
@@ -53,8 +55,10 @@ public static void main(String[] args) {
         }
 
         int bedrockPort = options.has(bedrockPortOption) ? Integer.parseInt(options.valueOf(bedrockPortOption)) : -1;
+        String remoteAddress = options.has(remoteAddressOption) ? options.valueOf(remoteAddressOption) : null;
+        int remotePort = options.has(remotePortOption) ? Integer.parseInt(options.valueOf(remotePortOption)) : -1;
 
-        DragonProxy proxy = new DragonProxy(PlatformType.STANDALONE, new File("."), bedrockPort);
+        DragonProxy proxy = new DragonProxy(PlatformType.STANDALONE, new File("."), bedrockPort, remoteAddress, remotePort);
 
         Runtime.getRuntime().addShutdownHook(new Thread(proxy::shutdown, "Shutdown thread"));
     }

proxy/src/main/java/org/dragonet/proxy/DragonProxy.java

@@ -103,25 +103,38 @@ public class DragonProxy {
 
     private long startTime;
     private int bindPort;
+    private String remoteAddress;
+    private int remotePort;
+
     @Getter
     private File dataFolder;
     @Getter
     private PlatformType platformType;
 
+    /**
+     * Constructs a new instance of the DragonProxy class.
+     * This is the main class for the proxy (although the command line option parsing is in the `bootstrap` module)
+     */
+    public DragonProxy(PlatformType type, File dataPath) {
+        this(type, dataPath, -1, null, -1);
+    }
+
     /**
      * Constructs a new instance of the DragonProxy class.
      * This is the main class for the proxy (although the command line option parsing is in the `bootstrap` module)
      *
      * @param bedrockPort a custom port provided from a command line option
      *                    to override the bind port in the config
      */
-    public DragonProxy(PlatformType type, File dataPath, int bedrockPort) {
+    public DragonProxy(PlatformType type, File dataPath, int bedrockPort, String remoteAddress, int remotePort) {
         INSTANCE = this;
 
         startTime = System.currentTimeMillis();
         platformType = type;
         dataFolder = dataPath;
         bindPort = bedrockPort;
+        this.remoteAddress = remoteAddress;
+        this.remotePort = remotePort;
 
         log.info("Welcome to DragonProxy version " + getVersion());
 
@@ -162,6 +175,8 @@ private void initialize() throws IOException {
             return;
         }
 
+        handleConfigOverrides();
+
         if(!RELEASE) {
             log.warn("This is a development build. It may contain bugs. Do not use in production.");
         }
@@ -223,6 +238,18 @@ private void initialize() throws IOException {
         }
     }
 
+    private void handleConfigOverrides() {
+        if(bindPort != -1) {
+            configuration.setBindPort(bindPort);
+        }
+        if(remoteAddress != null) {
+            configuration.setRemoteAddress(remoteAddress);
+        }
+        if(remotePort != -1) {
+            configuration.setRemotePort(remotePort);
+        }
+    }
+
     public void shutdown() {
         if (!shutdownInProgress.compareAndSet(false, true)) {
             return;

proxy/src/main/java/org/dragonet/proxy/configuration/DragonConfiguration.java

@@ -25,6 +25,7 @@
 import org.dragonet.proxy.remote.RemoteAuthType;
 
 @Getter
+@Setter
 @JsonIgnoreProperties(ignoreUnknown = true)
 public class DragonConfiguration {
     @JsonProperty("config-version")