Update issue templates

.github/ISSUE_TEMPLATE/submit-application.md

@@ -0,0 +1,15 @@
+---
+name: Submit application
+about: Add an app to this project
+title: ''
+labels: ''
+assignees: LinkLeong
+
+---
+
+Tested platform
+e.g. linux/amd64,linux/arm-v7,linux-arm64
+
+
+
+Please export and upload the configuration file of this application