Add latest-alpine

[nyurik]

It would make it a bit easier to use the alpine image without caring of the specific version, e.g. latest-alpine

Thanks!

[ImreSamu]

Hi @nyurik,

For some reason unknown to me, the upstream postgres repo ( https://hub.docker.com/_/postgres/ ) alpine image
does not have this label, only the debian image does.

imho: The reason for this might be worth finding out before making any changes. ( ~ Chesterton’s Fence principle )

[PrimeDominus]

@ImreSamu interesting that in my docker-compose files I'll do the following and it will give me the latest alpine image of postgresql. So, maybe something similar can be done e.g. postgis/postgis:alpine

FROM postgres:alpine
...

[ImreSamu]

similar can be done e.g. postgis/postgis:alpine

As I see - there is a related PR: #230