chore(readme): example

README.md

@@ -1,2 +1,51 @@
-# ServersHandler
-Handling servers with Redis
+# ServersHandler 2.0
+A complete rewrite of a 2 year old project.
+
+## Example
+```java
+public class Example extends JavaPlugin {
+
+    private ServersHandler serversHandler;
+
+    @Override
+    public void onEnable() {
+        serversHandler = ServersHandler.initialize(this, "Lobby", new JedisPoolBuilder()
+                .withDefaultConfig()
+                .hostname("localhost")
+                .port(6379)
+        );
+
+        serversHandler.registerListener(synchronizedServer -> {
+            System.out.printf(
+                    "Server %s was updated! (%s/%s)%n", 
+                    synchronizedServer.getName(), 
+                    synchronizedServer.getOnlinePlayers(), 
+                    synchronizedServer.getMaxPlayers()
+            );
+
+            Map<String, Object> data = synchronizedServer.getData();
+            System.out.println("value: " + data.get("key"));
+        });
+
+        Map<String, SynchronizedServer> servers = serversHandler.getServers();
+        System.out.println("Servers: " + servers.size());
+
+        SynchronizedServer local = serversHandler.local();
+        System.out.println("Local server: " + local.getName());
+
+        SynchronizedServer server = serversHandler.getServers().get("Lobby");
+        System.out.println("Lobby players: " + server.getOnlinePlayers());
+    }
+
+    @Override
+    public void onDisable() {
+        serversHandler.shutdown();
+    }
+
+    public void setKeyValue() {
+        SynchronizedServer local = serversHandler.local();
+        local.getData().put("key", "value");
+        serversHandler.publish(local);
+    }
+}
+```