update alpine, docker, docker-compose
update alpine, docker, docker-compose

update alpine to latest stable of 3.10
update docker to latest stable community edition of 18.09.7
update docker-compose to latest of 1.24.1
rm entrykit: codep was not documented, and not using start_docker command
rm cache busting: can use `docker build --no-cache` for that

meAmidos/dcind