update github workflow to address deprecations

Merge branch 'Artoria2e5-bash'

Merge pull request #9 from simonrupf/dependabot/docker/alpine-3.21

Bump alpine from 3.20 to 3.21

avoid setting unnecessary capability, use a single option variable

Merge remote-tracking branch 'upstream/main'

Merge pull request #6 from Artoria2e5/ptp

Merge pull request #5 from Artoria2e5/patch-1

Merge pull request #4 from simonrupf/dependabot/docker/alpine-3.20

Bump alpine from 3.19 to 3.20

Merge pull request #2 from simonrupf/dependabot/docker/alpine-3.19

Adds new variable to allow enabling control of system clock

Adds new variable to allow enabling control of system clock

Bump alpine from 3.18 to 3.19

Create dependabot.yml

update to Alpine 3.18