Bump dotenv from 5.0.1 to 16.4.7 in /frontend (#570)

* Bump dotenv from 5.0.1 to 16.4.7 in /frontend

Bumps [dotenv](https://github.com/motdotla/dotenv) from 5.0.1 to 16.4.7.
- [Changelog](https://github.com/motdotla/dotenv/blob/master/CHANGELOG.md)
- [Commits](motdotla/dotenv@v5.0.1...v16.4.7)

---
updated-dependencies:
- dependency-name: dotenv
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

* Change dotenv to use .config()

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Matthias Hüppi <maede97@hotmail.com>

frontend/package.json

@@ -26,7 +26,7 @@
     "@googlemaps/polyline-codec": "^1.0.28",
     "angular-split": "^18.0.0",
     "colors": "^1.4.0",
-    "dotenv": "^5.0.0",
+    "dotenv": "^16.4.7",
     "echarts": "^5.5.1",
     "ngx-echarts": "19.0.0",
     "ol": "^10.3.1",

frontend/set-env.ts

@@ -4,7 +4,7 @@ const targetPath = './src/environments/environment.ts';
 
 // Load node modules
 const colors = require('colors');
-require('dotenv').load();
+require('dotenv').config();
 
 // `environment.ts` file structure
 const envConfigFile = `export const environment = {