Add AlmaLinux Docker images with Ansible support

[MrKoopie]

Summary

Adds AlmaLinux 8, 9, and 10 Docker images with Ansible support, including a comprehensive GitHub Actions workflow for automated builds and publishing.

Features

Docker Images

• AlmaLinux 8, 9, and 10 base images
• Ansible versions: latest and core-2.16
• Multi-arch builds: linux/amd64 and linux/arm64
• Published to DockerHub: mrkoopie/almalinux{8,9,10}-ansible

GitHub Actions Workflow

Smart Build Strategy:

• Pull Requests: Only builds changed images with unique tags
  • Tags: pr-{number}-latest, pr-{number}-core-2.16
  • Allows testing before merge
• Main Branch: Builds all images with production tags
  • Tags: latest, core-2.16
• Cron Schedule: Weekly builds every Sunday at 2:10 AM UTC

Build Optimization:

• Git-based change detection (no external actions)
• Conditional execution to avoid unnecessary builds
• Multi-arch support for wider compatibility

Quality Assurance

✅ CodeRabbit Reviews (3 passes - all issues resolved):

• Fixed unquoted $pip_packages variables in all Dockerfiles
• Fixed alternatives command for RHEL/AlmaLinux compatibility
• Removed incorrect update-alternatives fallback

✅ Validation:

• yamllint: Passed
• Python YAML parser: Passed
• Workflow syntax: Valid

Files Added

• .github/workflows/build.yml - CI/CD workflow (485 lines)
• docker-almalinux8-ansible/ - AlmaLinux 8 image files
• docker-almalinux9-ansible/ - AlmaLinux 9 image files
• docker-almalinux10-ansible/ - AlmaLinux 10 image files

Prerequisites

Before merging, add these GitHub secrets:

• DOCKERHUB_USERNAME
• DOCKERHUB_TOKEN

Test Plan

After merge:

1. Workflow will automatically build and push images
2. Test images:

   docker pull mrkoopie/almalinux8-ansible:latest
   docker run --detach --privileged \
     --volume=/sys/fs/cgroup:/sys/fs/cgroup:rw \
     --cgroupns=host \
     mrkoopie/almalinux8-ansible:latest

🤖 Generated with Claude Code

Co-Authored-By: Claude noreply@anthropic.com