feat(server): add DefaultShareExpiration config option (#4082)

* add DefaultShareExpiration config option

* run prettier so that I can push

* undo reformatting

* sort imports

core/share.go

@@ -8,6 +8,7 @@ import (
 	"github.com/Masterminds/squirrel"
 	"github.com/deluan/rest"
 	gonanoid "github.com/matoous/go-nanoid/v2"
+	"github.com/navidrome/navidrome/conf"
 	"github.com/navidrome/navidrome/log"
 	"github.com/navidrome/navidrome/model"
 	. "github.com/navidrome/navidrome/utils/gg"
@@ -93,7 +94,7 @@ func (r *shareRepositoryWrapper) Save(entity interface{}) (string, error) {
 	}
 	s.ID = id
 	if V(s.ExpiresAt).IsZero() {
-		s.ExpiresAt = P(time.Now().Add(365 * 24 * time.Hour))
+		s.ExpiresAt = P(time.Now().Add(conf.Server.DefaultShareExpiration))
 	}
 
 	firstId := strings.SplitN(s.ResourceIDs, ",", 2)[0]