Add link for Nextcloud issues (#1486)

.github/ISSUE_TEMPLATE/Image_issue.md

@@ -6,7 +6,7 @@ about: Issues related to the Nextcloud Docker image
 <!--
 Thanks for reporting issues back to Nextcloud!
 
-Note: This is the issue tracker of Nextcloud **Docker image**, please do NOT use this to report issues with Docker or Nextcloud itself. You can find help debugging your system on our forums: https://help.nextcloud.com/ or https://forums.docker.com/.
+Note: This is the issue tracker of the official Nextcloud **Docker image**, please do NOT use this to report issues with Docker or Nextcloud itself. You can find help debugging your system on our forums: https://help.nextcloud.com/ or https://forums.docker.com/.
 
 To learn more about official images, see https://github.com/docker-library/faq
 -->

.github/ISSUE_TEMPLATE/config.yml

@@ -1,4 +1,7 @@
 contact_links:
+    - name: 🐛 Nextcloud issue
+      url: https://github.com/nextcloud/server/issues/new/choose
+      about: Bug reports and feature requests for Nextcloud
     - name: 🐳 Docker Support and Help
       url: https://forums.docker.com/
       about: Configuration, installation, networking and other questions