add multi-user mode closes #3

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

pkg/config/config.go

@@ -17,6 +17,7 @@ type MeterConfig struct {
 }
 
 type Config struct {
+	App    *AppConfig     `json:"app,omitempty" yaml:"app,omitempty"`
 	Meter  *MeterConfig   `json:"meter,omitempty" yaml:"meter,omitempty"`
 	Checks []*CheckConfig `json:"checks,omitempty" yaml:"checks,omitempty"`
 }
@@ -27,6 +28,7 @@ type CheckConfig struct {
 	Timeout  mtime.Duration `json:"timeout,omitempty" yaml:"timeout,omitempty"`
 	Interval mtime.Duration `json:"interval,omitempty" yaml:"interval,omitempty"`
 	Active   bool           `json:"active,omitempty" yaml:"active,omitempty"`
+	User     string         `json:"user,omitempty" yaml:"user,omitempty"`
 }
 
 type HTTPConfig struct {