properly resolve resource paths

web/src/main/java/lcsb/mapviewer/web/config/SpringWebConfig.java

@@ -17,4 +17,11 @@ public class SpringWebConfig extends WebMvcConfigurerAdapter {
     registry.addViewController("/").setViewName("forward:/index.xhtml");
   }
 
+  @Override
+  public void addResourceHandlers(ResourceHandlerRegistry registry) {
+    registry
+        .addResourceHandler("/resources/**")
+        .addResourceLocations("/resources/");
+  }
+
 }