docs: Add firewall section to troubleshoot (#618)

* Added firewall section

* updated the message

Author: Reshmi-Sriram

docs/www/docs/contribute/99-troubleshooting.md

@@ -41,6 +41,15 @@ In order to avoid this issue, you have a few options:
 4. Manually provide `--client-id`, `--client-secret`, `--app-name` and `--resource-group`.
 
 
+## SWA CLI - Domains that need Firewall access
+
+### Context
+If you are having trouble accessing SWA CLI, the following domains need to be allowed an access in your firewall:
+- blob.core.windows.net
+- azurestaticapps.net
+- swalocaldeploy.azureedge.net
+
+
 ## `Unable to download StaticSitesClient binary (File Not Found 404 - 403)`
 
 ### Context