Add SQL Support

Sql is now a possible source provider. See docs/ dir for more info.

v0.6.0

improve scheduler.

Public beta

v0.5.0

Update 03-etcd.md

v0.1.0

Well it should work with the crontab source / http executor 📦 😆

# Crontab Backend
docker pull fkconsultin/asparagus

docker run \
  --rm -ti \
  -v $(pwd)/example:/app \
  -e ASPARAGUS_SCHEDULER_PROVIDER_CRONTAB_SOURCE=/app/crontab \
  fkconsultin/asparagus