Fix postgres based image test

ci/test_mapserver_image.sh

@@ -30,7 +30,7 @@ debug "Done killing docker container."
 
 # Test with postgres settings provided
 debug "Starting test docker container (${image_url}:${image_tag})..."
-docker run --rm -d --name test -e POSTGRES_HOST=localhost POSTGRES_PASSWORD_FILE="/secrets/fake_file" -p 8888:80 ${image_url}:${image_tag} || exit_status=1
+docker run --rm -d --name test -e POSTGRES_HOST=localhost -e POSTGRES_PASSWORD_FILE="/secrets/fake_file" -p 8888:80 ${image_url}:${image_tag} || exit_status=1
 # just wait a bit to let the server start
 sleep 2
 debug "Container started. Starting curl basic request..."