dronie docker images proj needs to be upgraded

[robe]

Just noticed the docker images used by dronie and gitlab are running proj 4.8.0.

These will break as soon as

​https://github.com/postgis/postgis/pull/513

is committed

[strk]

This is the Dockerfile for what we're using to test master: ​https://git.osgeo.org/gitea/postgis/postgis-docker/src/branch/master/build-test/Dockerfile.trisquel2

If anyone wants to have a try at upgrading proj send a pull-request there (or push directly).

I'd also love to switch from Trisquel to a smaller image, like Alpine, if anyone wants to try that.

[robe]

We are using alpine now for at least PG12. Need to do the same for the others then we can close this out.

[robe]

I think this may have already happened with our last batch up docker image upgrades.

[robe]

I did a new docker build, since 3.4.0 needs a newer proj. That should take care of this