fix a linter issue

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

management/internals/network_map_db/factory/db_store.go

@@ -2,6 +2,7 @@ package networkmapdbfactory
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"os"
 
@@ -17,6 +18,8 @@ import (
 
 const storeSqliteFileName = "store.db"
 
+var NotSupportedStoreEngineError = errors.New("unsupported store engine")
+
 func NewNetworkMapDBStore(
 	ctx context.Context,
 	kind types.Engine,
@@ -58,7 +61,7 @@ func NewNetworkMapDBStore(
 		}, nil
 	}
 
-	return nil, nil
+	return nil, fmt.Errorf("networkmap store doesn't support engine %s, %w", kind, NotSupportedStoreEngineError)
 }
 
 func mustLookupDsnEnv() (string, error) {

management/internals/server/boot.go

@@ -5,6 +5,7 @@ package server
 import (
 	"context"
 	"crypto/tls"
+	"errors"
 	"net/http"
 	"net/netip"
 	"slices"
@@ -111,7 +112,10 @@ func (s *BaseServer) NetworkMapStore() *networkmapdb.NetworkMapDBStoreImpl {
 			s.Config.Datadir,
 			s.IntegratedValidator(),
 			s.SettingsManager())
-		if err != nil {
+		// networkmap db store supports postgres and sqlite backends only
+		// for other backends a fallback is used, so NotSupportedStoreEngineError
+		// is not a fatal error
+		if err != nil && !errors.Is(err, networkmapdbfactory.NotSupportedStoreEngineError) {
 			log.Fatalf("failed to create network map store: %v", err)
 		}
 		return store