Go 1.17.1 (released 2021-09-09) includes a security fix to the
archive/zip package, as well as bug fixes to the compiler, linker,
the go command, and to the crypto/rand, embed, go/types, html/template,
and net/http packages (see https://golang.org/doc/devel/release#go1.17)
Now comes with Go 1.17 pre-installed. To match production
docker-compose.yml examples, the development database was
renamed from "photoprism-db" to "mariadb".
This commit contains a few improvements discussed in PR #1432
with the primary goal to reduce the Docker image size.
Go has been upgraded from v1.16.4 to v1.16.6 as well.
