[zip] fix timezone of the zipped file

cabal.project

@@ -172,7 +172,7 @@ source-repository-package
     type: git
     location: https://github.com/robstewart57/rdf4h.git
     tag: 4fd2edf30c141600ffad6d730cc4c1c08a6dbce4
-
+    
 allow-older: *
 allow-newer: *
 

src/Gargantext/API/Node/Document/Export.hs

@@ -29,6 +29,7 @@ import Gargantext.Database.Schema.Node (NodePoly(..), node_user_id)
 import Gargantext.Prelude
 import Paths_gargantext qualified as PG -- cabal magic build module
 import Servant ( addHeader, (:<|>)((:<|>)), Header, Headers(getResponse) )
+import Data.Time.LocalTime (getCurrentTimeZone, TimeZone (timeZoneMinutes))
 
 api :: NodeId
     -- ^ The ID of the target user
@@ -81,10 +82,13 @@ getDocumentsJSONZip :: NodeId
 getDocumentsJSONZip userNodeId pId = do
   dJSON <- getDocumentsJSON userNodeId pId
   systime <- liftBase getSystemTime
+  tz <- liftBase getCurrentTimeZone
   let dexp = getResponse dJSON
   let dexpz = DocumentExportZIP { _dez_dexp = dexp
                                 , _dez_doc_id = pId
-                                , _dez_last_modified = fromIntegral $ systemSeconds systime }
+                                -- see https://github.com/jgm/zip-archive/commit/efe4423a9a2b1dc2a4d413917a933828d3f8dc0f
+                                , _dez_last_modified = fromIntegral (systemSeconds systime) +
+                                                       fromIntegral (timeZoneMinutes tz * 60) }
   pure $ addHeader (T.concat [ "attachment; filename="
                              , dezFileName dexpz
                              , ".zip" ]) dexpz