Dockerfile: Mark CentOS, Alpine as Deprecated. Add yum update to pull CentOS 7 packages
Added:
- Step to run
yum -y update
for the CentOS variant to pick up updated packages not available via security update [#74] - Troubleshooting doc for
gpg: keyserver receive failed: End of file
Changed:
- Updated README and corresponding Dockerfiles to deprecate Alpine, CentOS
- Bump docker-base version from
5.0.1
to5.1.0