Sure - setting it up is easy.   There are hard questions about database 
mutations however.   If you drop column bar from table Fubar, then the old 
code is still querying for buth Fu and Bar:

SELECT id, fu, bar FROM fubar ....

On-premise, this is the case for maybe 10 seconds, tops.   In the cloud, 
this could be the case for 30 minutes.

We've decided that this is the developers responsibility, and not the 
responsibility of DevOps CI/CD, just like the developer needs to either use 
cache-busting techniques when changing JS and CSS, or educate his users to 
press Shift-F5 when things go wrong.

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