Add libc6-compat to Alpine Docker docs (#319)
Add libc6-compat to Alpine Docker docs (#319)

* add libc6-compat

* add libc6-compat

* add libc6-compat to 7.4 alpine image

* rm libc6-compat from alpine Dockerfiles

* add libc6-compat to node:alpine docs

* include apk add command in docs

pesho/docker-node,nodejs/docker-node,joyent/docker-node,nodejs/docker-node,chorrell/docker-node,chorrell/docker-node