Build plone/frontend-builder:19.0.0-alpha.3

[ksuess]

Would you be so kind to create the images plone/frontend-builder:19.0.0-alpha.3 and plone/frontend-prod-config:19.0.0-alpha.3?
@sneridagh maybe?

https://hub.docker.com/r/plone/frontend-builder/tags?name=19
and
https://hub.docker.com/r/plone/frontend-prod-config/tags?name=19

[sneridagh]

Sorry for missing it. Building. https://github.com/plone/plone-frontend/actions/runs/16238951029/job/45852758863