add metrics http exporter

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

pkg/config/config.go

@@ -3,11 +3,17 @@ package config
 import (
 	"io"
 
+	yamlcodec "go.unistack.org/micro-codec-yaml/v3"
 	mtime "go.unistack.org/micro/v3/util/time"
-	yaml "gopkg.in/yaml.v3"
 )
 
+type Meter struct {
+	Addr string `json:"addr,omitempty" yaml:"addr,omitempty"`
+	Path string `json:"path,omitempty" yaml:"path,omitempty"`
+}
+
 type Config struct {
+	Meter  *Meter   `json:"meter,omitempty" yaml:"meter,omitempty"`
 	Checks []*Check `json:"checks,omitempty" yaml:"checks,omitempty"`
 }
 
@@ -35,5 +41,5 @@ func (cfg *Config) Parse(r io.Reader) error {
 		return err
 	}
 
-	return yaml.Unmarshal(buf, cfg)
+	return yamlcodec.NewCodec().Unmarshal(buf, cfg)
 }