alpine is @SGSGermany's base image for containers based on Alpine Linux. This image is built daily at 21:20 UTC on top of the official Docker image using GitHub Actions.
Rebuilds are triggered only if Alpine publishes a new patch release, or if one of Alpine's Mini Root Filesystem packages were updated. Currently we create images for Alpine 3.20, Alpine 3.19, Alpine 3.18, and Alpine 3.17. Please note that we might add or drop branches at any time.
All images are tagged with their full Alpine version string, build date and build job number (e.g. v3.15.4-20190618.1658821493.1). The latest build of an Alpine release is additionally tagged without the build information (e.g. v3.15.4). If an image represents the latest version of an Alpine release branch, it is additionally tagged without the patch version (e.g. v3.15), and without the minor version (e.g. v3); both without and with build information (e.g. v3.15-20190618.1658821493.1 and v3-20190618.1658821493.1). The latest build of the latest Alpine version is furthermore tagged with latest.
Please note that we disable Alpine's community repository by default. The reason is its limited support: In the main repository we can expect the full support cycle of 2 years, but community is only supported for about 6 months, i.e. until the next stable release (see Alpine wiki for more information). If you want to install packages from the community repository, make sure to always use Alpine's latest stable branch. You can then either re-enable the repository as a whole (run sed -i -E 's/^@community (.+)$/\1/' /etc/apk/repositories), or install single packages by tagging them with @community (e.g. apk add --no-cache package-name@community).