The Flux v1 migration how-to flows better if the section on how to set
builds up to tag images in the right way is its own document. It's a
lot to skim past when you don't need it, and (since it's a different
layer of yak hair) something you might want to figure out first if you
do need it.
Signed-off-by: Michael Bridgen <michael@weave.works>
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