Build Test on 11.x-dev

My fix try to make sure the directory exists before the action, if not they will create.

Please make a PR here https://github.com/simplytestme/website we've moved the code. Unfortunately I cannot turn off MRs here.

I think the fix is in https://github.com/simplytestme/website/pull/379, which ensures latest core versions get latest PHP + Apache image. The build silently failed on an unsupported version of Drupal core:

Use composer self-update --rollback to return to version 2.4.4
66bd16056c7d83449c0284db# /bin/sh -c echo "SIMPLYEST_STAGE_DOWNLOAD"
SIMPLYEST_STAGE_DOWNLOAD
66bd16056c7d83449c0284db# /bin/sh -c echo "SIMPLYEST_STAGE_PATCHING"
SIMPLYEST_STAGE_PATCHING
66bd16056c7d83449c0284db# /bin/sh -c echo "SIMPLYEST_STAGE_INSTALLING"
SIMPLYEST_STAGE_INSTALLING
66bd16056c7d83449c0284db# /bin/sh -c cd "${DOCROOT}" && echo '$settings["file_private_path"] = "sites/default/files/private";' >> sites/default/settings.php
/bin/sh: 1: cannot create sites/default/settings.php: Directory nonexistent
Command Failed (Tugboat Error 1064): Exit code: 2; Command: cd "${DOCROOT}" && echo '$settings["file_private_path"] = "sites/default/files/private";' >> sites/default/settings.php
66bd1604b4d70ade375179a9 (simplytest) is suspended

See, no Drupal codebase was added.

https://github.com/simplytestme/website/pull/379 was merged, verifying

D11 support should be fixed when https://github.com/simplytestme/website/pull/423 is merged

:) Should be all fixed, now.

Checked, and working perfectly now, thanks @mglaman !