AArch64 support
- spec: change hardcoded x86_64 arch to current platform arch;
- Dockerfile: Instead of pulling CentOS base images from dockerhub,
create them from scratch from the official SIG-cloudinstance repo:
http://artifacts.ci.centos.org/sig-cloudinstance/
- nginx.repo: Use $basearch instead of hardcoded x86_64;
- spec: Bump minor RPM version;
Co-authored-by: Jimmy Lafontaine Rivera <lafonj@gmail.com>
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
Change-Id: I1415675c7b2aae250b8f5dbd1e370a84ee5a878f