[static] use file server, this way index.html is served by default

src/Gargantext/API.hs

@@ -73,16 +73,12 @@ import           Servant
 import           Servant.Auth as SA
 import           Servant.Auth.Server (AuthResult(..))
 import           Servant.Auth.Swagger ()
-import           Servant.HTML.Blaze (HTML)
 --import           Servant.Mock (mock)
 --import           Servant.Job.Server (WithCallbacks)
 import           Servant.Job.Async
-import           Servant.Static.TH.Internal.Server (fileTreeToServer)
-import           Servant.Static.TH.Internal.FileTree (fileTypeToFileTree, FileType(FileTypeFile))
 import           Servant.Swagger
 import           Servant.Swagger.UI
 -- import Servant.API.Stream
-import           Text.Blaze.Html (Html)
 
 --import Gargantext.API.Swagger
 

src/Gargantext/API/FrontEnd.hs

@@ -19,9 +19,9 @@ Loads all static file for the front-end.
 module Gargantext.API.FrontEnd where
 
 import Servant
-import Servant.Server.StaticFiles (serveDirectoryWebApp)
+import Servant.Server.StaticFiles (serveDirectoryFileServer)
 
 type FrontEndAPI = Raw
 
 frontEndServer :: Server FrontEndAPI
-frontEndServer = serveDirectoryWebApp "./purescript-gargantext/dist"
+frontEndServer = serveDirectoryFileServer "./purescript-gargantext/dist"