Added product support github template

Author: jc21

.github/ISSUE_TEMPLATE/product_support.md

@@ -0,0 +1,16 @@
+---
+name: Product Support
+about: Need help configuring the software?
+title: ''
+labels: product-support
+assignees: ''
+
+---
+
+**Checklist**
+- Please read the [setup instructions](https://nginxproxymanager.com/setup/)
+- Please read the [FAQ](https://nginxproxymanager.com/faq/)
+
+**What is troubling you?**
+
+_Clear and concise description of what you're trying to do and what isn't working for you_