Update Alpine base to 3.20 (#86)

Merge pull request #83 from panubo/update-baseimage-version

Update to alpine:3.19

Rename build-push workflow since it is unique to this image

Renovation Alpine 3.18 and ARM32 builds (#81)

* Upgrade Alpine base 3.18, and dont cache apk
* Add arm32v6 and arm32v7 builds.
* Add noop test target to Makefile

Migrate to Quay and ECR

Add workflow to rebuild master on cron

Update to Alpine 3.14 base

release 1.3.0

update for 1.2.1 release

update readme to 1.2.0