Officially running your own website on a single bay My Cloud IS NOT supported.
Unofficially it “might” be possible to run web pages or a web site from the My Cloud. See the following discussions that almost exclusively deal with the older first generation v3.x/v4.x My Cloud units:
https://community.wd.com/t/host-web-site-on-mycloud/161116
https://community.wd.com/t/app-webhosting-for-firmware-v4-10-2015/94892
https://community.wd.com/t/host-a-dynamic-website/96553
https://community.wd.com/t/how-can-i-host-my-website-on-wd-my-cloud/95776
https://community.wd.com/t/hosting-a-website-on-wd-my-cloud/94766
https://community.wd.com/t/repository-with-software-worked-on-v4-firmware/94532
https://community.wd.com/t/clean-os-debian-openmediavault-and-other-firmwares/93714/1055
