Support custom alert provider

config/config.go

@@ -21,9 +21,9 @@ var (
 )
 
 type Config struct {
-	Metrics  bool            `yaml:"metrics"`
-	Alerting *core.Alerting  `yaml:"alerting"`
-	Services []*core.Service `yaml:"services"`
+	Metrics  bool                 `yaml:"metrics"`
+	Alerting *core.AlertingConfig `yaml:"alerting"`
+	Services []*core.Service      `yaml:"services"`
 }
 
 func Get() *Config {

config/config_test.go

@@ -143,7 +143,7 @@ services:
 		t.Error("Metrics should've been false by default")
 	}
 	if config.Alerting == nil {
-		t.Fatal("config.Alerting shouldn't have been nil")
+		t.Fatal("config.AlertingConfig shouldn't have been nil")
 	}
 	if config.Alerting.Slack != "http://example.com" {
 		t.Errorf("Slack webhook should've been %s, but was %s", "http://example.com", config.Alerting.Slack)