- 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

package.json

@@ -43,6 +43,7 @@
         "autoprefixer": "^10.4.13",
         "babel-preset-typescript-vue3": "^2.0.17",
         "chart.js": "^4.2.0",
+        "dotenv-webpack": "^8.0.1",
         "eslint": "^8.32.0",
         "eslint-config-prettier": "^9.0.0",
         "eslint-plugin-adonis": "^2.1.1",