use alpine3.7 based erlang images
use alpine3.7 based erlang images

verified working on arm64v8; from https://github.com/c0b/docker-erlang-otp/pull/70#issue-255420685
the erlang:20 alpine images should also work on i386, s390x, ppc64le; except arm32v7 is not verified

chorrell/official-images,neo-technology/docker-official-images,robfrank/official-images,docker-library/official-images,31z4/official-images,davidl-zend/official-images,thresheek/official-images,neo-technology/docker-official-images,31z4/official-images,robfrank/official-images,infosiftr/stackbrew,docker-library/official-images,robfrank/official-images,thresheek/official-images,chorrell/official-images,docker-solr/official-images,thresheek/official-images,thresheek/official-images,robfrank/official-images,davidl-zend/official-images,robfrank/official-images,docker-library/official-images,chorrell/official-images,dinogun/official-images,31z4/official-images,31z4/official-images,docker-solr/official-images,robfrank/official-images,jperrin/official-images,docker-solr/official-images,dinogun/official-images,jperrin/official-images,infosiftr/stackbrew,chorrell/official-images,docker-flink/official-images,infosiftr/stackbrew,docker-flink/official-images,jperrin/official-images,chorrell/official-images,jperrin/official-images,dinogun/official-images,neo-technology/docker-official-images,jperrin/official-images,docker-library/official-images,robfrank/official-images,infosiftr/stackbrew,dinogun/official-images,31z4/official-images,jperrin/official-images,docker-flink/official-images,robfrank/official-images,chorrell/official-images,thresheek/official-images,davidl-zend/official-images,infosiftr/stackbrew,neo-technology/docker-official-images,chorrell/official-images,infosiftr/stackbrew,neo-technology/docker-official-images,neo-technology/docker-official-images,thresheek/official-images,thresheek/official-images,jperrin/official-images,davidl-zend/official-images,chorrell/official-images,infosiftr/stackbrew,dinogun/official-images,docker-solr/official-images,docker-flink/official-images,docker-library/official-images,docker-library/official-images,docker-solr/official-images,chorrell/official-images,chorrell/official-images,31z4/official-images,docker-library/official-images,neo-technology/docker-official-images,chorrell/official-images,infosiftr/stackbrew,docker-library/official-images,infosiftr/stackbrew,dinogun/official-images,robfrank/official-images,infosiftr/stackbrew,thresheek/official-images,dinogun/official-images,dinogun/official-images,dinogun/official-images,thresheek/official-images,thresheek/official-images,docker-flink/official-images,31z4/official-images,31z4/official-images,neo-technology/docker-official-images,neo-technology/docker-official-images,neo-technology/docker-official-images,davidl-zend/official-images,docker-solr/official-images,docker-flink/official-images,davidl-zend/official-images,davidl-zend/official-images,davidl-zend/official-images,dinogun/official-images,31z4/official-images,davidl-zend/official-images,robfrank/official-images,chorrell/official-images,jperrin/official-images,docker-solr/official-images,robfrank/official-images,docker-library/official-images,docker-solr/official-images,jperrin/official-images,thresheek/official-images,docker-library/official-images,31z4/official-images,thresheek/official-images,docker-flink/official-images,31z4/official-images,docker-flink/official-images,robfrank/official-images,31z4/official-images,docker-solr/official-images,jperrin/official-images,davidl-zend/official-images,thresheek/official-images,neo-technology/docker-official-images,docker-solr/official-images,jperrin/official-images,neo-technology/docker-official-images,docker-solr/official-images,docker-flink/official-images,robfrank/official-images,davidl-zend/official-images,davidl-zend/official-images,dinogun/official-images,dinogun/official-images,infosiftr/stackbrew,docker-library/official-images,31z4/official-images,jperrin/official-images,docker-flink/official-images,thresheek/official-images,docker-library/official-images,docker-solr/official-images,docker-flink/official-images,dinogun/official-images,docker-solr/official-images,neo-technology/docker-official-images,docker-flink/official-images,infosiftr/stackbrew,davidl-zend/official-images,docker-solr/official-images,docker-flink/official-images,jperrin/official-images,docker-library/official-images,infosiftr/stackbrew,neo-technology/docker-official-images,infosiftr/stackbrew,chorrell/official-images,31z4/official-images,docker-library/official-images