- added npm package dotenv-webpack for using env variables on clientside

- added API File Controller for downloading files e.g. /api/download/1022
- also create has codes by submitting new dataset
- added edit dataset functionalities for role submitter
- added the following route for role submitter: /dataset/:id/update', 'DatasetController.update'
- created extra UpdateDatasetValidator.ts for validating updated dataset
- npm updates

start/routes.ts

@@ -172,6 +172,12 @@ Route.group(() => {
         .as('dataset.edit')
         .where('id', Route.matchers.number())
         .middleware(['auth', 'can:dataset-submit']);
+
+    Route.put('/dataset/:id/update', 'DatasetController.update')
+    .as('dataset.update')
+        .where('id', Route.matchers.number())
+        .middleware(['auth', 'can:dataset-submit']);
+    
     Route.get('/dataset/:id/delete', 'DatasetController.delete').as('dataset.delete').middleware(['auth', 'can:dataset-delete']);
     Route.put('/dataset/:id/deleteupdate', 'DatasetController.deleteUpdate')
         .as('dataset.deleteUpdate')