feat: update shoutrrr to v0.7 (#1543)

docs/notifications.md

@@ -30,7 +30,7 @@ To send notifications via shoutrrr, the following command-line options, or their
 -   `--notification-url` (env. `WATCHTOWER_NOTIFICATION_URL`): The shoutrrr service URL to be used.  This option can also reference a file, in which case the contents of the file are used.
 
 
-Go to [containrrr.dev/shoutrrr/v0.6/services/overview](https://containrrr.dev/shoutrrr/v0.6/services/overview) to
+Go to [containrrr.dev/shoutrrr/v0.7/services/overview](https://containrrr.dev/shoutrrr/v0.6/services/overview) to
 learn more about the different service URLs you can use. You can define multiple services by space separating the
 URLs. (See example below)
 

go.mod

@@ -3,7 +3,7 @@ module github.com/containrrr/watchtower
 go 1.18
 
 require (
-	github.com/containrrr/shoutrrr v0.6.1
+	github.com/containrrr/shoutrrr v0.7.0
 	github.com/docker/cli v20.10.23+incompatible
 	github.com/docker/distribution v2.8.1+incompatible
 	github.com/docker/docker v20.10.23+incompatible
@@ -36,8 +36,8 @@ require (
 	github.com/hashicorp/hcl v1.0.0 // indirect
 	github.com/inconshreveable/mousetrap v1.0.1 // indirect
 	github.com/magiconair/properties v1.8.7 // indirect
-	github.com/mattn/go-colorable v0.1.12 // indirect
-	github.com/mattn/go-isatty v0.0.14 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.16 // indirect
 	github.com/matttproud/golang_protobuf_extensions v1.0.2-0.20181231171920-c182affec369 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/moby/term v0.0.0-20210619224110-3f7ff695adc6 // indirect

pkg/notifications/email.go

@@ -63,6 +63,7 @@ func (e *emailTypeNotifier) GetURL(c *cobra.Command) (string, error) {
 		UseHTML:     false,
 		Encryption:  shoutrrrSmtp.EncMethods.Auto,
 		Auth:        shoutrrrSmtp.AuthTypes.None,
+		ClientHost:  "localhost",
 	}
 
 	if len(e.User) > 0 {