fix(scan): enable to report if some warnings occured on scanning (#805)

* fix(scan): enable to report if some warnings occured on scanning

* alpine, debian, freebsd, suse

* -format-full-text, -format-list, -format-one-line-text

* implement slack.go

* implement tui.go

* go fmt

models/scanresults.go

@@ -60,6 +60,7 @@ type ScanResult struct {
 	ReportedRevision string    `json:"reportedRevision"`
 	ReportedBy       string    `json:"reportedBy"`
 	Errors           []string  `json:"errors"`
+	Warnings         []string  `json:"warnings"`
 
 	ScannedCves       VulnInfos              `json:"scannedCves"`
 	RunningKernel     Kernel                 `json:"runningKernel"`
@@ -319,6 +320,9 @@ func (r ScanResult) ServerInfoTui() string {
 	if len(r.Container.ContainerID) == 0 {
 		line := fmt.Sprintf("%s (%s%s)",
 			r.ServerName, r.Family, r.Release)
+		if len(r.Warnings) != 0 {
+			line = "[Warn] " + line
+		}
 		if r.RunningKernel.RebootRequired {
 			return "[Reboot] " + line
 		}