Make all paths configurable and default to

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

store/pkg/flagset/flagset.go

@@ -131,7 +131,7 @@ func ServerWithConfig(cfg *config.Config) []cli.Flag {
 		},
 		&cli.StringFlag{
 			Name:        "data-path",
-			Value:       "/var/tmp/ocis-store",
+			Value:       "/var/tmp/ocis/store",
 			Usage:       "location of the store data path",
 			EnvVars:     []string{"STORE_DATA_PATH"},
 			Destination: &cfg.Datapath,

store/pkg/service/v0/service.go

@@ -242,7 +242,7 @@ func (s *Service) Tables(ctx context.Context, in *proto.TablesRequest, out *prot
 }
 
 // TODO sanitize key. As it may contain invalid characters, such as slashes.
-// file: /var/tmp/ocis-store/databases/{database}/{table}/{record.key}.
+// file: /var/tmp/ocis/store/databases/{database}/{table}/{record.key}.
 func getID(database string, table string, key string) string {
 	// TODO sanitize input.
 	return filepath.Join(database, table, key)