Add auth token guard to start target

Author: HarshCasper

Makefile

@@ -52,7 +52,8 @@ frontend:
 
 ## Start LocalStack in detached mode
 start:
-		localstack start -d
+		@test -n "${LOCALSTACK_AUTH_TOKEN}" || (echo "LOCALSTACK_AUTH_TOKEN is not set. Find your token at https://app.localstack.cloud/workspace/auth-token"; exit 1)
+		@LOCALSTACK_AUTH_TOKEN=$(LOCALSTACK_AUTH_TOKEN) localstack start -d
 
 ## Stop the Running LocalStack container
 stop: