Upgrade base image for alpine docker images

[anikin-aa]

Folks, hi !

Are you planning to upgrade base image of arangodb (3.6.x, 3.7.x) alpine docker image ?

https://github.com/arangodb/arangodb-docker/blob/official/alpine/3.6.15/Dockerfile https://github.com/arangodb/arangodb-docker/blob/official/alpine/3.7.9/Dockerfile

Now it's uses alpine:3.11 and according to snyk it contains high https://snyk.io/vuln/SNYK-ALPINE311-APKTOOLS-1534687 vulnerability, that is fixed in 3.14.1, for example