PLT-5900 Removed automatic configuration of SiteURL (#5952)

* Revert "PLT-5765 Passed SiteURL to SendNotifications (#5705)"

This reverts commit a8e68bd890.

* Removed automatic configuration of SiteURL

* Reverted unintentional config changes

* Updated help text

* Added link to docs in Site URL warning

* Fixed merge conflict

Makefile

@@ -319,6 +319,7 @@ package: build build-client
 
 	@# Disable developer settings
 	sed -i'' -e 's|"ConsoleLevel": "DEBUG"|"ConsoleLevel": "INFO"|g' $(DIST_PATH)/config/config.json
+	sed -i'' -e 's|"SiteURL": "http://localhost:8065"|"SiteURL": ""|g' $(DIST_PATH)/config/config.json
 
 	@# Reset email sending to original configuration
 	sed -i'' -e 's|"SendEmailNotifications": true,|"SendEmailNotifications": false,|g' $(DIST_PATH)/config/config.json