- Add isWindows flag to dockerManager
- `CalculateCpuPercentWindows` and `CalculateCpuPercentLinux` methods added to container.ApiStats
- Remove prevNetStats.Time in favor of Stats.PrevRead
- Replace regex Windows check with strings.Contains, and check the `/containers/json` response
The Docker daemon's API returns different values on Windows and non-Windows systems. This impacts
the calculation of `cpuPct` and `usedMemory` for each container. The systems are disciminate on the
`Server` header send by the server. Uses the unix stats calculation in case the header is not set.
`docker stats` implementation for reference:
https://github.com/docker/cli/blob/master/cli/command/container/stats_helpers.go#L100
Co-authored-by: Benoit VIRY <benoit.viry@cgx-group.com>
