feat(auth-app): make service optional plus docu

Signed-off-by: jkoberg <jkoberg@owncloud.com>

ocis/pkg/runtime/service/service.go

@@ -3,7 +3,6 @@ package service
 import (
 	"context"
 	"fmt"
-	authapp "github.com/owncloud/ocis/v2/services/auth-app/pkg/command"
 	"net"
 	"net/http"
 	"net/rpc"
@@ -14,6 +13,8 @@ import (
 	"syscall"
 	"time"
 
+	authapp "github.com/owncloud/ocis/v2/services/auth-app/pkg/command"
+
 	"github.com/cenkalti/backoff"
 	"github.com/cs3org/reva/v2/pkg/events/stream"
 	"github.com/cs3org/reva/v2/pkg/logger"
@@ -161,11 +162,6 @@ func NewService(options ...Option) (*Service, error) {
 		cfg.AppRegistry.Commons = cfg.Commons
 		return appRegistry.Execute(cfg.AppRegistry)
 	})
-	reg(3, opts.Config.AuthApp.Service.Name, func(ctx context.Context, cfg *ociscfg.Config) error {
-		cfg.AuthApp.Context = ctx
-		cfg.AuthApp.Commons = cfg.Commons
-		return authapp.Execute(cfg.AuthApp)
-	})
 	reg(3, opts.Config.AuthBasic.Service.Name, func(ctx context.Context, cfg *ociscfg.Config) error {
 		cfg.AuthBasic.Context = ctx
 		cfg.AuthBasic.Commons = cfg.Commons
@@ -330,6 +326,11 @@ func NewService(options ...Option) (*Service, error) {
 		cfg.Audit.Commons = cfg.Commons
 		return audit.Execute(cfg.Audit)
 	})
+	areg(opts.Config.AuthApp.Service.Name, func(ctx context.Context, cfg *ociscfg.Config) error {
+		cfg.AuthApp.Context = ctx
+		cfg.AuthApp.Commons = cfg.Commons
+		return authapp.Execute(cfg.AuthApp)
+	})
 	areg(opts.Config.Policies.Service.Name, func(ctx context.Context, cfg *ociscfg.Config) error {
 		cfg.Policies.Context = ctx
 		cfg.Policies.Commons = cfg.Commons