Deploy a WAR as root in WildFly
Updated:
using maven / manual deploy
Save your war with the name ROOT.war and deploy it, WildFly will configure it as root application.
using configuration files
In your [MAVEN_ROOT]/webapp/WEB-INF create jboss-web.xml and add:
<jboss-web>
<context-root>/</context-root>
</jboss-web>
serve index.html
To serve your main page update web.xml:
<welcome-file-list>
<welcome-file>index.html</welcome-file>
</welcome-file-list>