Update alpine to version 3.9

[ErdtR]

Any plans to update Alpine version to v3.9? It was released several days ago https://wiki.alpinelinux.org/wiki/Alpine_Linux:Releases Also, the official alpine docker image updated latest tag to 3.9 https://hub.docker.com/_/alpine

[beardedeagle]

I've been unable to get node 11.9.0 to build in alpine 3.9 yet myself