Update .env

Updated MIG to 0..19

Signed-off-by: JHancox <48477639+JHancox@users.noreply.github.com>

Author: JHancox

deploy/monai-deploy-express/.env

@@ -1,5 +1,5 @@
 # Container Images
-INFORMATICS_GATEWAY_IMAGE=ghcr.io/project-monai/monai-deploy-informatics-gateway:0.3.18
+INFORMATICS_GATEWAY_IMAGE=ghcr.io/project-monai/monai-deploy-informatics-gateway:0.3.19
 INFORMATICS_GATEWAY_CONFIG_IMAGE=dwdraju/alpine-curl-jq:latest
 WORKFLOW_MANAGER_IMAGE=ghcr.io/project-monai/monai-deploy-workflow-manager:0.1.19
 TASK_MANAGER_IMAGE=ghcr.io/project-monai/monai-deploy-task-manager:0.1.19