Upgrade Guide Cookieplone review

[stevepiercy]

I updated the Upgrade Guide Cookieplone section. This also brings up new issues that must be resolved before the final Volto 18 release.

See also:

• Update cookie* references to current Volto 18.0.0-alpha.43 release documentation#1706
• Update cookie* references to current Volto 18.0.0-alpha.43 release #6289
• Update Glossary with new Cookieplone project generator and deprecatio… documentation#1707

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📚 Documentation preview 📚: https://volto--6290.org.readthedocs.build/

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[sneridagh]

LGTM, although I dislike the "Sponsored OSS Docker images" naming.
For me it's the recommended community published Docker Image, the fact that it's right now in Docker Hub is circumstantial and could change in the future, eg. hosted in GH.

[stevepiercy]

Yeah, I'm not thrilled about the naming, either, but we have an "Official" Plone image (which IMO should be deprecated to avoid confusion for Plone 6) https://hub.docker.com/_/plone.

I forgot to ask, in the Upgrade Guide, we mention that developers need to adapt their projects to the new way of doing things, but we don't tell them how to do that. I think that should also go into the Upgrade Guide.