Issue template for alpha (#4206)

Author: samtstern

.github/ISSUE_TEMPLATE/alpha_bug_report.md

@@ -0,0 +1,42 @@
+---
+name: 🧪 Alpha SDK bug report
+about: Have you found a bug in one of our pre-release or alpha SDKs? File it here.
+title: ""
+labels: "alpha"
+assignees: ""
+---
+
+<!-- Step 1 [READ THIS] -->
+<!--
+Are you in the right place?
+  * For issues or feature requests related to __the code in this repository__
+    file a Github issue.
+  * If you are not yet participating in our Alpha and would like to join, use this form:
+    https://forms.gle/bKBEm48W8EMPLaUp9
+  * For general Alpha discussion, use the google group:
+    https://groups.google.com/g/firebase-js-sdk-testers
+-->
+
+<!-- Step 2 -->
+
+### [REQUIRED] Describe your environment
+
+  * Operating System version: _____
+  * Browser version: _____
+  * Firebase SDK version: _____
+  * Firebase Product: _____ (auth, database, storage, etc)
+
+<!-- Step 3 -->
+
+### [REQUIRED] Describe the problem
+
+#### Steps to reproduce:
+<!--
+  What happened? How can we make the problem occur?
+  This could be a description, log/console output, etc.
+-->
+#### Relevant Code:
+
+```javascript
+// TODO(you): code here to reproduce the problem
+```

.github/ISSUE_TEMPLATE.md renamed to .github/ISSUE_TEMPLATE/bug_report.md

@@ -1,3 +1,11 @@
+---
+name: 🐞 Bug report
+about: Found a bug in the JS SDK? File it here.
+title: ""
+labels: ""
+assignees: ""
+---
+
 <!-- Step 1 [READ THIS] -->
 <!--
 Are you in the right place?
@@ -33,12 +41,6 @@ Are you in the right place?
 -->
 #### Relevant Code:
 
-<!--
-  Reproduce the issue on StackBlitz and provide your forked URL
-  or give us some sample code below
--->
-https://stackblitz.com/fork/firebase-issue-sandbox
-
 ```javascript
 // TODO(you): code here to reproduce the problem
 ```

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: 🔥 Firebase Support
+    url: https://firebase.google.com/support/
+    about: If you have an urgent issue with your app in production, please contact support.