Feat report googlechat (#1257) (#1258)

* feat: Support Ubuntu21

* feat(report): Send report via Google Chat

* feat(report): Send report via Google Chat

* Snip too long message as (The rest is omitted).

* sorry for mixed feat-ubuntu21 branch. exlucded it

* append diff, attack vector and exploits info

* add ServerName filter by regexp

* rename variables and rewrite validators

* fix renaming miss

* fix renaming miss, again

config/googlechatconf.go

@@ -0,0 +1,32 @@
+package config
+
+import (
+	"github.com/asaskevich/govalidator"
+	"golang.org/x/xerrors"
+)
+
+// GoogleChatConf is GoogleChat config
+type GoogleChatConf struct {
+	WebHookURL       string `valid:"url" json:"-" toml:"webHookURL,omitempty"`
+	SkipIfNoCve      bool   `valid:"type(bool)" json:"-" toml:"skipIfNoCve"`
+	ServerNameRegexp string `valid:"type(string)" json:"-" toml:"serverNameRegexp,omitempty"`
+	Enabled          bool   `valid:"type(bool)" json:"-" toml:"-"`
+}
+
+// Validate validates configuration
+func (c *GoogleChatConf) Validate() (errs []error) {
+	if !c.Enabled {
+		return
+	}
+	if len(c.WebHookURL) == 0 {
+		errs = append(errs, xerrors.New("googleChatConf.webHookURL must not be empty"))
+	}
+	if !govalidator.IsRegex(c.ServerNameRegexp) {
+		errs = append(errs, xerrors.New("googleChatConf.serverNameRegexp must be regex"))
+	}
+	_, err := govalidator.ValidateStruct(c)
+	if err != nil {
+		errs = append(errs, err)
+	}
+	return
+}