Remove unneeded apk handling & optimize packages (#5)
Remove unneeded apk handling & optimize packages (#5)

* Remove unneeded apk handling & optimize packages

Refering to https://github.com/docker-library/openjdk/blob/9a0822673dffd3e5ba66f18a8547aa60faed6d08/8-jre/alpine/Dockerfile

* remove `gnutls-c++` and install `libgcc libstdc++` as dependencies

Adam-/inspircd-docker