Changed 404 to index.html

Change-Id: Ida48284e3bc4ca6e062785854534e4d473f430b3

jams-server/src/main/java/net/jami/jams/server/core/TomcatLauncher.java

@@ -113,7 +113,7 @@ public class TomcatLauncher {
         //Register error pages.
         ErrorPage notFound = new ErrorPage();
         notFound.setErrorCode(404);
-        notFound.setLocation("/404");
+        notFound.setLocation("/index.html");
         ErrorPage genericError = new ErrorPage();
         genericError.setErrorCode(500);
         genericError.setLocation("/500");