add more avaje config options (#141)

Author: SentryMan

avaje-jex/src/main/java/io/avaje/jex/BootJexState.java

@@ -20,9 +20,9 @@ State create(BeanScope beanScope) {
     jex.configureWith(beanScope);
 
     JexConfig config = jex.config();
-    int port = config.port();
-    config.port(Config.getInt("server.port", port));
-
+    config.port(Config.getInt("server.port", config.port()));
+    config.contextPath(Config.get("server.context.path", config.contextPath()));
+    config.host(Config.get("server.context.host", config.host()));
     jex.lifecycle().onShutdown(beanScope::close);
     return new State(jex.start());
   }

avaje-jex/src/main/java/io/avaje/jex/JexConfig.java

@@ -2,6 +2,7 @@
 
 import java.util.Map;
 import java.util.concurrent.Executor;
+import java.util.concurrent.Executors;
 import java.util.function.Consumer;
 
 import com.sun.net.httpserver.HttpsConfigurator;
@@ -48,8 +49,7 @@ public sealed interface JexConfig permits DJexConfig {
   JexConfig disableSpiPlugins();
 
   /**
-   * Executor for serving requests. Defaults to a {@link
-   * Executors#newVirtualThreadPerTaskExecutor()}
+   * Executor for serving requests. Defaults to a {@link Executors#newVirtualThreadPerTaskExecutor()}
    */
   Executor executor();
 
@@ -70,7 +70,7 @@ public sealed interface JexConfig permits DJexConfig {
    */
   JexConfig health(boolean health);
 
-  /** Returns the configured host. (Defaults to localhost if not set) */
+  /** Returns the configured host. */
   String host();
 
   /**