revert storage, remove tracing.service and bring back common

proxy/pkg/config/config.go

@@ -1,13 +1,19 @@
 package config
 
-import "context"
+import (
+	"context"
+
+	"github.com/owncloud/ocis/ocis-pkg/shared"
+)
 
 // Config combines all available configuration parts.
 type Config struct {
+	*shared.Commons
+
 	Service Service
 
 	Tracing Tracing `ocisConfig:"tracing"`
-	Log     Log     `ocisConfig:"log"`
+	Log     *Log    `ocisConfig:"log"`
 	Debug   Debug   `ocisConfig:"debug"`
 
 	HTTP HTTP `ocisConfig:"http"`