Add form file documentation

Signed-off-by: Sukanya Pandey <sukapan1@in.ibm.com>
Change-Id: I578ead17e5870ae0981aba775c258b49d697a208
diff --git a/docs/.vuepress/config.js b/docs/.vuepress/config.js
index 45e5088..616f6dd 100644
--- a/docs/.vuepress/config.js
+++ b/docs/.vuepress/config.js
@@ -49,6 +49,7 @@
             "/guide/components/",
             "/guide/components/alerts/",
             "/guide/components/buttons/",
+            "/guide/components/file-upload/",
             "/guide/components/info-tooltip/",
             "/guide/components/page-section/",
             "/guide/components/page-title/",